Pregnant on the Pill

Ok so my boyfriend and I had sex 2 days ago without a condom and he asked me afterwards if I was taking my pill. I told him of course, but then I was in complete shock that he came inside of me. I've only been taking the pill for a month so I have no clue if it's actually effective. I know I won't have signs of pregnancy yet but still, I'm getting super paranoid about it and can't stop thinking about it. Plus I know so many people who were in the .1% of getting pregnant while on the pill. I just don't want to be pregnant yet!