Scared

Me and my boyfriend were having unprotected sex yesterday and we were curious about how it would be if he ejaculated in my butt. So we tried it and it ran down and got on the outside of my vagina. He wiped it off and I went and peed and then tried to also get it out by rinsing it with the shower head. Right after that we went and bought and Plan B pill and I took it immediately. It was probably between 30-45 minuets when I took it. We had unprotected sex again this morning but he did not ejaculate in me at all. I’m very nervous and I’m supposed to start my period anywhere from today or in a couple days. Do y’all think I’m going to be fine?? I’m so nervous and stressing myself out about it. Ive also started having cramp like symptoms today.