please help

helloooo, im 16, about to be 17. and ive been sexually active the past two months and each month i did get my period, i just ended mind about a week ago, but recently i’ve been experiencing some symptoms, it hurts in my stomach to try and pee but it also feels like i really need to go, and i do see a bit of blood when i wipe what could this mean? also if it is pregnancy what can i do?