pregnancy

Brittany
I have a question. I've had unprotected sex a few times recently, but I'm on birth contol. I have gotten sick with a sinus infection and started taking antibiotics. 
Will the antibiotics make me not have a period when I take my sugar pills?
 I think I might be pregnant and will take a test in a few days but I was just wondering if antibiotics can affect that? I have never had that happen before and I am always on antibiotics 🙄