This threatens to be long as I attempt to comment on lots of the interesting things you've been posting lately (while I've been mopping up vomit/offending bosses etc..) and also to give a proper update on where we are up to. Feel free to skip the entire thing. (Maybe as I only post about once a week, I can be a little forgiven for one long post a week rather than several concise ones?!!
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So.. PA I hope you are feeling better now. Feeling under the weather with two LOs is definitely no fun at all. In answer to your question, I always carry a pack of treats that the DSs can have whenever we go out and exchange them for the ones they can't have (and then dispose of the contraband quickly - into my mouth!!
) From about the age of 2 and a bit I was telling DS1 that '...' would make his tummy feel poorly at the moment (in case he grows out of it), but that '...' would not. Now, aged nearly 4, he told the man in church at Christmas, who was offering chocolate coins, (in the one place I hadn't thought to take an exchange) that he couldn't have one and waited until we got home for a replacement. It is possible to buy soya- and dairy-free chocolate I believe, but you'll need to search for it and you might think your DD has not had enough of it previously to miss it. I go with haribo sweets, but I know that's not an option for you.
Scones I have felt like you on a huge number of occasions in the last two years. I always thought BBB sounded like a wonder woman, and she has confirmed above that she is! In my house, I can honestly say that often it is bloody hard work and occasionally things run smoothly (gives inane 
!!) I'm sure IC might have something to say if I try and hang it on having two DSs, rather than two DDs, and it could just be their characters (and obviously, we've been tested on a few medical fronts too). In all seriousness, I regularly need to get out and away (and have occasionally considered whether the DSs and DH would even be better off if I didn't come back 
). Like PA said, going to the supermarket counts as a treat after a long day, and I pretty much loathe going there!!! Despite the above, I can honestly say that having two DS is finally starting to get easier (medical stuff not withstanding). I actually sat in the hairdressers last week while one had his haircut on the chair and the other played independently without running for the door/weeing on the floor/pushing over another tiny client!! Just occasionally, I might now finish a conversation with a mum friend at playgroup, but usually still come home totally worn out!! I know that might not give you much hope at the mo, but I hope it will show you that your feelings are entirely normal - well, as normal as I am!!
IC Glad to hear you are feeling quite well, but with a few reassuring symptoms. Sounds like you are doing well too BC.
BBB I will be hoping fervently that DS2 has not read your DD2's idea of vomiting at weddings!! It has crossed my mind and DH has suggested just taking an extra packet of wipes. He was clearly being 'funny', so I might just use his kilt to mop it up if the eventuality occurs!! As for tartan trousers, I've rebelled and gone for shirt, trousers and tie for DS2 and the same combo, with added waistcoat, for DS1. I think the MIL will cry when she sees them and forget all about wearing tartan. My FIL is considering wearing them instead apparently, but I'm not sure he should, as it feels a bit like he's trying to muscle in on the wedding party (or is off to test out his golfing skills following the meal!!).
SB loved the cake pic, as I said. I'm starting to get nervous about how to make a George pig cake for about 20 people. I made Lightening McQueen for DS1 last year - will add a photo next time I've got the camera lead handy.
BG Loved the birthday photos and glad DD2 enjoyed the long birthday celebrations. We're having DS2's party on Sunday and the guests are aged 1-5. Pary bags are proving to be tricky due to that!
As for the health of both DS:
DS1 is now waiting to go back to Birmingham for a follow up. The samples they took were all clear. This means that it is likely to be IBS or something along those lines. We have removed the gluten again from his diet (along with the dairy still) and he is gaining weight again, has not complained of achey legs, has no more conjunctivitis etc.. He is still lethargic at times but is not currently anaemic. The dietician last week worked out DS1's body mass index. With his recent weight gain, it is just on the borderline for being normal (at 14). He still looks like a famine victim, but seems to be heading in the right direction. Putting him back on his old reflux meds has lessened his complaints of tummy ache at meal times, helps him to eat more than 5-6 mouthfuls at a meal and he hasn't regurgitated any food/water since Christmas Day (when they both did it!!)
DS2 has been sick 17 times in the last 3 weeks I think. He is starving hungry and has put the weight back on that he lost in the first week. He is cutting one of his back four big molars. Teething used to make him more sick, although he seemed to deal better with each set. Consequently, until they are all through, I don't think we will honestly be able to rule that out as a cause. Apart from that, he definitely is not digesting foods with skins (e.g. grapes, cucumber, roasted parsnips, sweeetcorn etc..) which seem to sit in his tummy for up to 10 hours, with tummyache, and then make him sick. The first batch of incidents followed a 10 day re-introduction of dairy, but we'd need to try it again to clarify, as it seemed more like a bug, although the rest of us didn't catch anything. On Saturday, I think it was pure reflux, but obviously a 2 year old's dose!! He's back on his reflux meds too, which is helping, but not entirely keeping things under control. He has also been referred to Birmingham. He has still only slept through the night about 10 times and usually wakes us between 2-5 times, often in pain and complaining of tummy ache. The health visitor is going to send out her nursery nurse to 'help' with the sleeping. However, I'm confident that we're not doing wrong things (and I can't leave a boy in pain) so I'm not holding my breath for a miracle cure. So, BBB, as you see, I haven't really got a bloody clue what's going on, but I'd quite like to step off and go to a spa for a few days to try and regain/retain my sanity. 
I swing from thinking we're having a really hard time, and trying to be kind to myself and DH, to remembering the families with whom I work who put me to shame with what they cope with (and telling myself to get a grip!)
Anyway, if you've made it to the end, have some 
. Sorry to take up so much space at the end of the thread.