After having sex there's a dark spot that came out of my private parts

I need some help I have a question regarding my statUs. 

Im worried about it.  I'm married now, and having sex with my husband. he using fingers but I feel hurt little bit. It's my first time happen in my life . After that having sex. There's a dark spot come out to my private part.he ask me if I have a period. But I don't have yet"  he worried too. Do I have infection of this? Please somebody help me .. thanks