Plonky if it makes you feel any better at 8 weeks before I was pretty much in denial about the whole thing, and was no longer speaking to the caterers because I wanted to just order something of their menu and they wanted me to drive all the way out to the venue to taste stuff. Like why? 6 weeks before I was in NY on business and in a mega sulk about it, because who wants to be in NY when they could be at home with their DP (in my defence I was young and in love.... and obviously had no clue). About a month before I got my arse in gear. So on that basis, you've got ages.
Gerry bloody hell woman you've done brilliantly. Whatever you manage from now is incidental in the grand scheme of thing. 2.5 stone!!!!! That's nearly 2 toddles!!!
As for DH, can I be so bold as to suggest now really isn't the best time to be making any fundamental decisions on that front. I think the stage you guys are at is probably one of the hardest in marriage, as you've been together long enough for the honeymoon period to have worn off, but not long enough for either of you to have attained your career goals, or reached the comfort of the financial stability of middle age. Throw in the massive adjustment that is the first year of parenthood, and you've got the potential for a bit of a wobble.
The diet won't be helping either. I have a tendency to not eat when I'm stressed, and when I haven't eaten enough my mood goes pretty black and everything about DH drives me half demented. That's normal I'd say. Bodies don't like being short of anything, be it food, or water, or even emotional support, and they tend to give up on us when they are.
Do you think you'd benefit from a bit of a break from the day to day? Maybe spend a weekend at your mum's, so you could put your feet up, or do a bit of work prep, whilst dd played with granny and chased the dog. Sometimes it helps to break the routine, and I'm sure your mum would love to see you. Failing that come over to mine and have a moan! I have tea, and no chocolate 
Stormy enjoy your weekend off. You'll miss her you know! I'm totally ok with dolitoddle not being here during the day, but at night... too weird.
Oh and if I'm two years younger than the man, that makes the man exactly the same age as DH. How's about that! We're all old
Plonky is MrsSilliestNameEver taken? It has a certain ring.... 
As for me, I have just been for a swim, and the water is so warm now my feet only went white then blue. We're past the purple spotted stage. So that's good then.