should i worry about pregnancy?

I am on the pill and take it perfectly, I’ve been on it for a over a year. my boyfriend and I have sex quite a bit but we don’t use condoms like we used to, instead he pulls out. as I mentioned, i’m on the pill and never missed a day and take it around the same time (99% of the time perfectly on time, has to take it an hour early once this month). i’m about a little over a week away to my next withdrawal bleed and my boobs feel like they’re getting bigger (I notice new stretch marks) - I could be just freaking myself out tho. and I guess I’ve been gaining a bit of weight. should I be worried about pregnancy????