Last night I was having anal sex with my boyfriend, and suddenly his penis came out and hit my vagina and it hirts a lot, but I'm sure that it didn't go into it, and after 2 seconds there were a red blood came out and it was a lot and most likely like the red brownish blood from the period and the day before that happened it was my last day of period so does that blood from the hymen or from the left over of the period please help I want to know if my hymen still there or its broken? And is there a 100% way to know weither its broken or not??