someone please help!

i had unprotected sex last week on oct 21, it’s now the 26th. the next day he asked me if i was on birth control even though we have been having sex without a condom for several times before this one. him saying that made me nervous so naturally i asked if he finished in me and he told me he didn’t and that i should “chill out.”

I am on birth control and have been for 2 years taking it perfectly, yet my period week was supposed to start the 24th and i’m still not on it. I don’t know what to do, or if there is even a chance i could be pregnant. someone please help im really nervous and need reassurance/ guidance

i’m also 20 years old and have been with this same kid for about 5 months. yet no we didn’t talk about me being on birth control