I need help !

Okay so I am on the birth control pill tri-estarylla but I got switched to tri milli so I will be starting that tomorrow ( I just took my last tri estarylla pill in the pack today & the next pack I start will be my new tri milli)

I started my period Monday … wasn’t anything heavy and it was just like I was beginning my period

Well I had sex Monday night . We done anal without a condom and he finished inside of my butt . I went and used the bathroom afterwards .

We both cleaned off

Well then we had vaginal sex and he used a condom and pulled out

My period has still been normal I’m still bleeding and filling up tampons

So my question is am I at risk for pregnancy? I’m just worried especially with the new pill I am about to start. I don’t know how it will affect me so I want to make sure I’m not at risk for pregnancy right now