What is going on?

I’ve been spotting since a week after my period ended. It switches from being light pink to a brownish mucus discharge. I also have had light cramping almost every day.

I have on and off nausea but have never vomited yet. Sometimes I get dizzy. I’ve had a lot of fatigue too. My areolas look larger too now.

I’m 3 days away from when I’m projected to start my period and have taken 3 tests, all negative.

What is going on?