So I have irregular periods. I was supposed to get my period the beginning of Dec. but never did. So I didn’t know when I was expected to ovulate

On the 31st of Dec. I had unprotected sex. My bf fully came in me. On the 1st of January(next day) at around 2:30 pm I took a plan b. So I took it 22 hours after unprotected sex. I’m overweight for my height. I heard it doesn’t work if you’re more than 165.

I also was experiencing discharge before we had sex. Ovulation like but I was discharging the whole month of Dec. so I didn’t think anything of it

7 days later of taking the plan b, I’m experiencing mild cramping, and slight slight slight nipple discomfort. Very faint soreness.

Is this the plan b? Once again I’m not sure when my next period is due so I’m not sure if it’s my period or possible pregnancy? I’ve taken plan b’s in the past. But usually I take them a couple hours after unprotected sex. Never 22 hours after.

I’m young(19) so my parents say I’m very fertile because of my age. Is it possible within that 22 hour span an egg could’ve fertilized?