Pregnant!???

Okay so Friday me and my boyfriend had sex and he came inside me, I’m on birthcontrol pill and I’m on placebo starting this Tuesday could I be pregnant or get pregnant if I get this period thoes that mean I’m not pregnant...or do I have to wait for the next period....I’m really freaking about I never missed a pill there was like 2 time where I took my pill 2 hours late from the regular time please help me out !!!!!!!!!!