Are you pregnant if in the morning you throw up saliva and it taste like orange juice and acid?
Depends on the woman in question. You could be or it could’ve just been one too many drinks.
You may have gotten screwed, but that sounds like you just had to many screwdrivers last night.
Maybe, maybe not. Very few symptoms are specific to pregnancy in its first few weeks. Take a pregnancy test at least 2 weeks after you last had unprotected sex, if you have not had a period in the meanwhile.