Help!!

I had sex with my bf on March 21st. i’m on the pill and take it everyday around the same time. we used a condom but took it off and finished on my lower stomach. i don’t think anything got inside of me but i’m not sure. I have had sore boobs for about 2 weeks and i’m due for my period in a week. I also have had some cramping on and off. pregnancy on the pill has happened in my family before. Should I be worried?