Second, today is my 21st birthday and last night I got really drunk. I dont drink usually, the last time I drank anything was one Mikes Hard Ice Tea on 4th of July. I didn't eat anything all day except a weight watchers pizza ( 400ish calories) and I had a lot of shots and a lot of water. I kept peeing and peeing last night. This morning I was three pounds lighter. I wonder if it has to do with the drinking. I have never lost that much weight in one day except with a diet pill. Anyone have any ideas?