I’ve got nothing to worry about, right?

My period is late by about 4 days so far. The last time I had sex was like March 1st or 2nd, and I’ve had 2 periods since then. But starting last Thursday, when I should’ve started, my breasts have been sore and I’ve been fatigued - which I attributed to not wearing a bra for a while and excessive schoolwork, respectively.

I know your period could be late or missed completely because stress (school+pandemic?), or excessive workouts (I wouldn’t call my workouts excessive though). And I’ve been told that if your period is enough to fill pads and tampons, there’s no way you’re pregnant.

Part of why I’m so concerned is because my mom said she didn’t find out she was pregnant with me or any of my sisters until a couple months in because she still continued to have her periods. Which I asked a professional and they said that doesn’t really happen.

I’m okay, right?