Sometimes I feel more pregnant than other.

Yesterday I was feeling super pregnant, belly was big and round for 11 weeks. Last night me and my husband finally decided to have intercourse (we haven't had none since finding out we was prego, safety measures) well after we were done my belly felt different. The belly went down, I kinda don't fell prego. I still go to the bathroom often to pee and my breat still feel sore but I don't feel prego. I don't know of I'm over reacting or just feeling paranoid.