Getting Sick the Next Morning

[Tron]

This has been happening all too often lately. After a night of drinking, I go to sleep feeling good, but, come 7 or 8 in the morning, I am hunched over the toilet throwing up everything I ingested the previous day. The worst part about this is that I am totally sober while throwing up, so my face hurts and tears start flowing and all the horrible effects of vomiting legitimately manifest themselves, whereas vomiting while drunk really isn't that bad because, hey, you're drunk.

Anyway, does this happen to anyone else, and if it does, do you have any reason why?