First time having sex

I when to my boyfriend house and we had sex it didnt last lone cause it hurt me it didny go sll the way in just enough to pop my cherry i know when you poop it you vagain start bleeding a little but i started my period this on 4.16.16 i had sex and started my period and I usually start arounf the 20s but anyways it was unpretented  but it only last like maybe 5 mins today a need month and  i havent started