Help!

Shelby • We have an August 16’ baby and April 20’ baby with some MC’s along the way. Baby #3 due March 22’
Okay, AF isn't due until the 3rd of November. I got very heavy dark red/clots yesterday 10/25 and its continuing today but not as heavy but still red. My AF is usually red but not as red and not as heavy. Is this my period or implantation bleeding? My SO and I are ttc and I hope it is IB but I hope nothing's wrong! Please help, anyone!