[wonderbread]

Personally if you didn't want to have sex at all you should have said no. And it didn't seem like you said no, whatsoever. If you had and he continued, that would have have been sex against your will, then that would have been rape. At any time you didn't have to do what he said and whatnot, but you didn't.
Although at the same time he knew you were drunk, he did not have to have sex with you in that state of mind.
At the end of the day it was just a huge drunken mistake.

And as far as being pregnant, if you miss your period or are late take a pregnacy test in a few weeks.