Suggest Remedy For Bleeding And Foul Smell In Vagina After Sex

Hi, I am 20 and female I just had sex for the first time yesterday. Well I had some hymenal tissue that was hurting so he ended up cutting it with a (disinfected) knife. In the morning I wanted to test everything was normal down there so I just felt it and found it smelled like dead meat and then I found blood on my underwear (not a lot). Is it normal? How long am I going to be bleeding?