Does this seem right....

J

I did a fresh transfer on Nov 8th. Nov 18 I got a positive beta and then Nov 20th it dropped to a 7 so it was a chemical. I started my period on the 24th and it lasted it's normal 3 days. Today cycle day 20 my period started again....does that seem super early or is it just me. I need to start BC for my next cycle but could it just be spotting? I have a feeling it's not because it has been getting heavier as the day continues. Has anyone else experienced this?