Hello, please don't judge just want help!

My period history is as follows

Jan : 21

Feb:15

March :19

I had unprotected sex on March 21 my period was finishing that day we had sex once and he didn't cum we didn't go all the way,

We had another sessions and he cummed on me no where near inside of me

When then had sex in the shower but not long just some strokes and such

He did not cum

Then after we had sex and he cummed on me

I and him are 100999% sure no cum actually got in me and he is good at pulling he has never missed or been out of control

My only risk is the pre cum but apparently that chance is low ??

I'm kind of stressing out and my period is due tmo can someone give me some advice my stress is causing me to feel nauseous 😂 but I also get that when I'm close to my period too my boobs have swollen as normal just praying its my period and hope it's not late since sometimes I'm not always on the same date

Help and please no hate, I will be going on the pill soon!

UPDATE: so since my period is kinda off I'm not crazy worried but I got it on the 19 last month and the 15 the month before and today is April 20th and I still haven't gotten it help! What are my chances ??? I feel fine and my breast are swollen as they usually get before my period !