I need advise.. am I pregnant or not.....

Ok so this past week to a week and a half, I have been on and off nauseous. I almost threw up at work but it passed after 5-10 minutes. I’ve also been way hungrier than I normally am.. like I eat a meal and I’m hungry 20 minutes after.

I thought there was a possibility of pregnancy so I tested a day before my period was due and it came back a hard negative.

I am now 4 days late and on day three I started lightly spotting (light brown color) and today (day 4) the spotting continues. Light, still light brown with a tiny bit of pinkish red.

Am I pregnant? Or is my period just out of whack? Should I test again and if so when would be the best time to test for more accuracy?