Question: why is this happening to me?

Ahni

Can anyone relate? My period was due 3 days ago. I took a pregnancy test yesterday and it came out negative, however it was later in the day. Then today I randomly had intense cramping and I assumed it was my period but no blood and it completely went away after about 30 minutes. Is this is sign of early pregnancy? Or is my period just being weird? I’ve never had this happen to me so idek what to think!