What Causes Vaginal Bleeding During Sexual Intercourse And Urination?

Hi...........In ending of August i took a morning after pill and i didn't get no period for September so In this month October i took a pregnancy test it came negative.....so now a few days ago I've been experiencing some blood on the condom after sexual intercourse....not normal menstrual blood and wen i urinate i don't see anything only wen i wipe i see a slight blood....now wen i urinate some darkish stringy mucus blood falls out my vagina......plz help and thanks......other info am on vitamins A and B, the Vitamin C is finished for a while now.