Got my period 7/25. Didn’t get period in August. I assume my body was stressed (traveled for 3 weeks). Took over 10 pregnancy tests, all negative.

Had sex with condom on 9/9. Paranoid that condom unrolled so I took plan b. Experienced spotting for 4 days. Got super heavy period after the spotting.

Is there a chance of pregnancy or am I safe since I got my period? I know for a fact this is a real period and not just induced by plan b since it had blood clots and it came right away, so must have been also from August.