Hi, i will be 17 yrs old in 2 months and i had sex for the second time yesterday, the first time after having sex i did not experience bleeding but the second time i felt pain while penetration was deep and then after sex i felt a little soar, i think this mite be due to him hitting my cervix, the next morning i woke up and i was bleeding , not heavily but i am not due my period yet, do you know what the cause of this could be , should i be worried?