I need reasoning

Marlene

So my period is late by 8 days, I took two tests different brands 2 days ago and it came out negative but now I'm throwing up and I'm not sure if it's acid reflux or not.

I work as a tech for an animal shelter so I walk A LOT 5 days out of the week and I drink a lot of caffeine. Everything smells funky there so nausea isnt a good clue. I'm not sure if it's just that or if I tried the tests too early.

My boyfriend and I use condoms but I'm still uneasy because it's been a week 😨