Can someone please give some advice

Hi everyone so I am 18 my boyfriend is 19. Last night (wednesday) we were having sex. The condom broke as soon as he came and he came inside me.

It was the 4th day of my period and I am on birth control. I was supposed to start my new pack of pills on Tuesday, but I didn’t take them and I didn’t take them last night either because we had to deal with some stuff and I forgot.

We are always always careful about wearing a condom even tho I’m on birth control because we are simply not ready for a baby.

Is there any possibility I could be pregnant? Also, when would I be able to take a test? Again, it was on jt he 4th day of my period and I am on birth control but didn’t take the first two of the new pack.

Thank you for your help and please be considerate