Help, please answer

Hey so I had unprotected sex jan12. My last period was dec.25 . I took plan b the next day cuz I was super worried that idk if I was ovulating or already ovulated.

I took plan b and got my period the expected next week. Jan 21. Was bright red that's as much as I can remember

I no longer had sex since.

Comes feb I get my period again around same day , feb 22. I remember having bad cramps. Can't remember flow much.

At this point I thought I was in the clear and I didn't worry since jan cuz I saw my period come.

Come march and one day I took too many vitamins ( all at once and I upped the dose myself so was taking too much vitamin d , c and many others, was trying to protect myself from the virus lmfao, I took too much vitamin b12 as well the past days. I woke up and peed red urine and I threw up that day. It all seemed like I gave my body too much of a good thing. My pee went back to normal after drinking water and I felt 100% fine the next day , guess all those vitamins flushed out.

Got my period for the month of march , didn't think anything of it as I was used to it.

My periods aren't usually long. 3 days at most.

Come April and I got my period on the 19th I remember it was red and had some clots was gooyish too. Had pms symptoms and my tits got small again.

I don't know what got into me but I suddently started worrying if I was pregnant? I was reading up on stories of girls not knowing till it was too late ( for abortion ) or catching them by surprise but giving birth at home.

All that got me super worried. Not sure if it's the quarantine that's Doing this but I find myself thinking about it and when I start getting worried I get a type of anxiety which makes me feel sick.

I have no other symptoms really I'd get anxiety which would make me feel sick , but when I'm not thinking about it I feel fine.

I'm super young and if I were to get a pregnancy test I'd have to tell my mom this fear and situation I have. Something I don't wanna do.

What do you guys think? One part of me is freaking out one is telling myself to calm down since I did bleed each month.

Thoughts that crossed my mind were the fact that some people did experience bleeding and mistaken it for a period.

How do I know it was a period ? And not bleeding in pregnancy ?

I have not gained any weight , I don't see any belly and my boobs have not changed they only increase 1 week before my period .