Dark brown blood

Keturah
I have a question: I am 9wks and 1day and my husband and I had sex last night. Well a hour later I had to go to the bathroom and when I did I had very dark brown blood flow out of my like a period it had some dark clumps in it. As I continued to wipe it lighted up, and now its almost completely gone. My question is has this happened to anyone else? I am gonna call the doctors office at 8 to see if they want me to come in but I just wanted to get a few opinions.