Can I start birth control the same day I take plan B??

So i hooked up with this guy, we were using a condom but then it hurt so bad so we took it off and then we kept having sex then he pulled out. Then he peed and we had sex again and he didn’t pull out...twice. I took plan B after it happened and then i started bleeding last night because it was the first day of my period. Do you think my chances for getting pregnant are lower since he came in me the first day of my period and I took plan B??? Also i realize i’m done taking risk so i wanna get on birth control again. Will it be too many hormones or be too much if I start a pack of birth control tonight ???? (I know i’m stupid for going raw, that’s why I want to start birth control tonight )