Me and my bf had protected sex- he took the confirm off for maybe 30 seconds and out it back on- he was no where near close to finishing. I took a Plan B just to be extra safe. My period came the next week like it was supposed to. I haven’t gotten the next period I was supposed to I missed it. It’s 17 days late. I have another one coming up the 24th. What should I do? I’m 18. I’m scared.