Bleeding in early pregnancy

I believe that I am about 8 weeks pregnant, first appointment is later this week. Sunday night fiancé and I did the deed and I starting bleeding. Bright red and not a lot but enough to be scared. The past two days I’ve been have brown blood at night when I wipe after using the bathroom. I’m going to mention this to he OB but was wondering if this is normal or if I should be checked right away?