Bleeding

Hi everyone, I'm 4 weeks and 4 days as of today. I was supposed to get my period Wednesday, but tested early Monday to find out I was pregnant. Anyway, we had sex Wednesday and I bled a little... Was too overly concerned since that was the day I was supposed to start. We had sex again last night and I bled again. I'm starting to get a little worried. I didn't continue to bled after or anything. Just right after sex when I went to the bathroom. Is this normal? Should I call my OB? I don't go to the Dr until Nov 14 and I don't want to seem like that crazy mom. This is my 2nd pregnancy and I never had it with my first one.