Bleeding after sex!?!

Liz • Baby #2 due 12/24!
Last night I had sex, and it was uncomfortable. I woke up around 3am with light pink blood and then red blood. I couldn't sleep because I was freaking out. I went to the bathroom again about an hour later and it was light brownish. I went again this morning and there was a small blood clot. Is this normal after sex? I don't have my first drs apt for another two weeks! :-(