Wow, I've said it before, but this thread moves at lightning speed!
I had loads I wanted to comment on but I've forgotten lots, but here goes some!
Bras: I feel you... I definitely need to go and get measured, even with an extendor already in place. I definitely got benefit out of the extender strap up until now (17 weeks for me) but as my boobs feel like they're about to explode out of my work top I think I need to get measured properly!
Sleep: yes, I'm the same - waking up either for a pee, or just randomly, at around 3-4am and just not being able to get back to sleep at the moment, for a good hour or so. It's really annoying. I've tried reading to make myself tired again if I do wake up, which sometimes works and sometimes doesn't, depending on the book!
Meltdowns: oh good lord I had one at the wedding we went to over the weekend. I forgot / didn't realise how difficult it'd be to be the sober one as the night went on. The OH basically - through booze and party excitement and family all being together - turned into some kind of drunken beast as far as I was concerned. I got zero sense from him after about 11pm, he kept walking away from me or ignoring me, so I pretty much stormed off to bed then had a crying fit the next morning when he (very hungoverly) apologised for being a bit of a drunken arse. All is well and there was no damage aside from some grumpiness, but it's the kind of thing that pre-baby I'd have been irritated by but ultimately ignored. Not now! Hysterical sobbing in our room .... nice. 
. The wedding weekend was very lovely though - it's made me want a proper holiday because being away for a couple of days was lovely.
I am so jealous of all you ladies finding out sex! My scan is 23rd September... it's dragging so much. Like someone else said (I think it was ever maybe?) - no movements for me yet either, booo 
. Or if there are movements, I am not sure if they're just digestion/belly rumbles, so I don't want to get my hopes up and then panic if they fade off!