Do i have a chance at being pregnant?

Okay, eve says my period is due in 3/4 days and this morning I had sex and he used protection ( I don't have birth control due to financial issues right now and only just started having sex and didn't expect it this morning) and finished and i got off him and didn't feel anything inside of me but when I went to the toilet just before I felt the condom come out... And it was a squished and kinda broken and I'm probably stupid but I'm needing some reasurance or someone to tell me if I could be pregnant, I doubt I could but there is a fear in my mind...

P.s sorry if this is not the right group to ask this but idk what other group to post on I'm new to all of this...