How likely is it that I’m pregnant?

Sorry in advance for any tmi!!

So my boyfriend and I are trying to avoid pregnancy. We’ve been having sex since September and have always been very careful. I’m not on birth control yet but we always use a condom, as well as him pulling out. Three days ago we had sex with no condom for only about two minutes, but it was all the wrong mix. I had made him cum through oral about twenty minutes before hand, and he didn’t go to the bathroom and I was at an 11% risk of getting pregnant. Today I took plan b, within the 72 hour deadline, but I was cutting it close. Yesterday and today I had some pain in my right lower stomach. I’ve never had pain while ovulating so that’s a little weird for me. It’s obviously too early to test but I’m just a little worried. Any advice or anything to calm my nerves would be great.