Sex and pregnancy TMI?

I am only 5 weeks... but a week ago my dh and I were intimate and afterward it hurt so bad!!! it was like a raw burning feeling and it would hurt when I wiped or washed in the shower : ( it finally went away and we were intimate tonight and TMI slow and gentle and it hurts really bad... the same feeling as last time.. and I used astroglide tonight... is this normal?!?! and I don't have any STI's