I have done so many daft things when drunk I've lost count! Usually of the over friendly type though! 
One that really springs to mind though was a work leaving do. I'd been ill all week with a really bad cold so had taken loads of Sudafed, sends me loopy on it's own due to the caffeine, never mind with booze added. I really dosed up as was still feeling rough, but was having a fantastic time. My then manager was also a friend of my then bf, we met at her wedding and got together that night.
The leaving do was in the November I think, and my bf and I had been together for about 8 months at the time. My manager, who I suppose was also a kind of friend had spent that 8 months desperately trying to find out if me and the bf had spent the night together after her wedding, we had shared a room but it was none of her damn business. She had also been very sarcastic about our relationship and just generally annoying. She was known as a right nosy cow in work.
Anyway after a few wines she basically blurted out that she knew he had come back to my room, and the rest is really a blur. I just let rip, I really went for her, it was the culmination of 8 months of wanting to tell her to mind her fucking own! I was taken to a taxi rank and sent home, could barely stand.
Found out later she ended up in tears later on, I spent the weekend in turmoil but all was ok on the Monday and it was never spoken about again.
Shit like this happens, hope you are feeling better now, it's really not worth stressing over.