Whats wrong with me 🥴

so , I have had my period for this month already for starters.

The day before I started my period, I took a pregnancy test which was negative.

I took the test a day before my period because I was anxious and had been having an feeling weird prior.

I got my period and it lasted about four days a medium flow.

But I've still been very nauseous, sleeping a lot, cramping, and back pain. I haven't taken another test since then.

But should I?

Could I possibly be pregnant anyway?

This morning i woke up nauseous, throwing up something yellow in color with a very horrible after taste. Almost acidic like.