HELP please

brittany

I am new here and am genuinely just seeking some words to put my mind at ease, I take my birth control on time every single day when i’m supposed to and have sex with my boyfriend but he also makes sure to pull out (I know not 100%) but I am about a week away from period and am having very very sore nipples and only one of them is hard like randomly? I just need to know i’m alright and this isn’t leading to an unwanted pregnancy, I am not experiencing any other pregnancy symptoms I would say maybe just normal almost PMS symptoms, please help anyone!!