Help!

Hey everyone I has unprotected sex and he finished in me. I took plan b the next day and I was worried because I was not sure if i was ovulating.

But I got my period on expected day and full on with clots - my period only lasts 2-3 days at most .

What now? All is good. Since I took the pill I've been getting my period each month around same date. My breast get bigger before period then go back down after and I get my usual leg pain and tmi (diarrhea) during period.

I have notice I have been breaking out badly with cheek acne , it could be anything but is their a link? Or have I just been stressing. ( kinda went through a breakup )

I was also taking a lot of vitamins including high doses of b12 , vitamins D , C and a few other oils. I had taken too much for a few days and woke up dizzy and nauseated.

After I calmed down I felt fine and I didn't feel sick the next day or any day after.

I haven't had sex since January and already got my period for the month of April- so far my period is constant and comes in the same week.

Could I be pregnant ? Am I ok? I feel fine and have no symptoms i sometimes feel a bit nauseous in the morning but just around the throat area I think it's anxiety but in read super scary stories of unknown pregnancy and how someone can go for months and not know ... that freaked me out ... and how some get a period still?

Thanks for the support. I live with parent and since in quarantine cuz of covid can't get a test at the moment