Scared I’m pregnant

A week ago, I had unprotected sex with this guy I started dating. The first time we used a condom the second I didn’t realize we didn’t use one. He fully went inside me. I took the plan b pill within 12 hrs. I have used several cycle trackers and none of them suggest I was ovulating on that day. Most say it was a couple days to one day before. I’m supposed to get my period next week and am freaking out I’m pregnant. How do you know for sure your ovulating? I believe my vaginal area was completely dry. Each time I used the bathroom nothing was there when I wiped. How accurate are cycle trackers?