Bleeding after sex

Hello , Girls ! 
I' m so nervous right now , cause I don't know what may be the problem
With me . It's too late to call my doctor  .Me and my husband haven't had sex in 2 month . Finally I just had sex with my husband  , everything seemed normal to
Me , but right after we finished , he told me that he has blood on him . I went to  wash myself and notice a bright red blood on the toilet paper. I freaked out !  It's my 11 day since the last period which was late with 10 days . It can't be period . I had a PAP test it was normal . The blood isn't that much it's like spotting but it bothers me . Have you ever  bleed after sex and what was the reason ?