Help!!

Okay so I decided to completely stop taking birth control Sunday so I just finished up the pack on Sunday and was done but Wednesday me and my SO had sex WITH a condom on and it broke and he did finish inside of me I was on top and ran straight to the restroom after we realized what happened and I quickly got in the shower, I took plan B within 3-4 hours after it happened, but I changed my method of birth control back to condoms on the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> and it says I started ovulating the day AFTER it happened, is it possible I am ovulating? Has this ever happened to anyone? I'm having some cramps on my right side. HELP super scared and need some reassurance