What to do... in need of feedback

So I’m going to make this short and sweet... I’m on birth control (been in it for over a year) my boyfriend and I have been having lots of unprotected sex. We just bought condoms so NO more I said Cus it freaks the shit out of me... my period was 2 days late but I still got it it just wasn’t as heavy or as long as my regular one. I got hella cramps on the first day but didn’t bleed that much which my first day varies sometimes it’s light sometimes it’s a crime scene. But the second day is always horrific. This time my second day was also light then my period stopped on the third day... I was like wait no come back... but right now I just don’t feel right and I’m worried I did take a test on the third day and it came back negative. I just don’t know what to do????

** I will admit I have been a little stressed lately ** but normally I can feel when I’m getting stressed, this time it was JUST starting like a couple days before my period, just family things.