I’m scared

Im 17 and me and my boyfriend are regally having sex. I went on the pill 7 days ago but we had unprotected sex 5 times before I went on the pill. I have been wondering for a week or so am I pregnant? My breaths have gone tender, I keep seeing things pop up about pregnancy. I’m going to take a test tomorrow, if it comes back as I’m positive how do I keep calm about the situation and do I tell my mum:( help me