Today my breasts (in particular my nipples) have been sensitive. Not to the point where they hurt if I touch them but I notice them a lot more sensitive to the touch. I am wondering what is causing this? Could it be that I am starting my placebo week in my birth control pill pack? I skipped last month's period because I had to take antibiotics for strep throat and I wanted to avoid any complications with my birth control not being effective. I do not believe I am pregnant. I take my pills every day as instructed and I did not have sex during the course of my antibiotics and for a week after.