is there a way to not stress it have anxiety?

I need some help. I have sex regularly like once or twice a week. I am on birth control and take the pill the same time every day. I am very specific and literally take it obbthe dot. We also use condoms. I check it all the time to. But I have anxiety that I am pregnant. I check my boobs to see if they hurt or if my areoles have gotten darker or I feel my tummy to check. Every month I have the stress and I don't know what to do about it. I almost try to not have sex that often do I dont have to stress. Any advice?