HI: My BF and i had unprotected sex on 6th October. He mostly injected sperm inside of me. We went and got the Plan B One step in less than 2 hours. I am in the middle of my cycle, and not ovulating at that time. I got Diarrhea next 3 day evenings... (I guess it’s a less common side effect). Little bit cramping for 3 days.

I started periods on 18th , 4 days early. everything is normal so far...

do I still have to worry about getting pregnancy?

since then we never had sex...

please help