HELP!! PLEASE ANSWER!!!

Okay so my period started dec 1 and ended dec 5 I had protected sex dec 7th, 8th, & 12th. We used condom. But my partner was in me for about 2/3 mins without condom and then I made him put it back on And 3 days ago I started bleeding and it’s been about 3 week since my last period could this be my period or could I be ovulating or what could it be? I really need help it was my 1st time having sex and idk if this is normal or not!! Could I be pregnant? Ive been cramping a lot like if it could be my period but when I get my period my underwear get dirty and now this only happens when I whip