I got a faint line on a pregnancy test about 5 days ago. I’ve been getting negative tests since then and started cramping last night. This afternoon my period started (3 days early) and it’s mostly dark brown with some clotting and very heavy. My cramps are still there, but my regular cycles I don’t cramp until day 2-3 and it’s always a very light flow until day 3.

Is this a possible chemical pregnancy?