Hi everyone,
Sounds like a lot of good weekends and new people (hello!).
Wasindie, hope you are ok tonight. 4th day is just a number, perhaps think of it as a second day 3? Don't focus on the day, just take it hour by hour, or minute by minute.
Thanks to everyone for the support over the weekend, particularly on Saturday night. I've just had some really good advice from a friend of a friend whose DD went through the same thing, so can now go to the doctor armed with more facts about possible medical solutions.
I am amazed that I got through the weekend in some ways but in others the whole pile of crap just made me more determined to stay sober. Last night DD ended up in our bed and DH was in a bunkbed and I am so glad I was sober. I hate thinking of all the times we have co-slept when I have been drunk. 
In laws were horrid. DD was pretty tantrummy because she was in pain, in a new place, tired and mainly because she is two! MIL was horrified and said that DH never ever had a tantrum as a child(and proudly said that it was because he was scared of her). She said that DD behaviour had made her suicidal this weekend (in all seriousness). She also said that DD behaviour was because of the way i was 'training' her. Like a dog. Which puts more credence to mine and DH theory that he was raised by the family dog. Anyway, I could fill pages with rants on them but I won't ... I wish we could never see them again (as does DH) but they are so manipulative and toxic that we can't see any way out working.
Anyway, JWN, you are so right. Dealing with them sober was actually easier, I just rose above it and was more able to protect my lovely daughter from their sniping and total inability to look after a child. Again, I hate to think what slipped past me in the past.
Sorry I haven't responded individually to all the lovely support. This thread kept me going this weekend, not only were you all there when I wanted to get plastered on saturday but I read most of thread two over the weekend to keep me focused. JWN, Mouse, RedMoomin (MoominMags?), Wasindie, Trinity (sorry for anyone missed)you are all incredible. I feel like I know you all a bit more after reading that thread and am even more in awe of you all. Ive also done lots of thinking but I have prattled on long enough so will leave my thoughts / questions for another day!