Caffeine and alcohol?

Ok, I realize mixing caffeine with alcohol is bad but i was having a good time and didnt think about it. I had a latte then when out and had a margarita. I almost passed out and have been in bed for awhile. My head is still a bit fuzzy but i feel better than before. Is there anything i can do to feel better? I have been drinking water. and I have a feeling I'm gonna feel horrible tomorrow. can I do anything to prevent or at least weaken that effect?