Implantation Bleeding or Breakthrough Bleeding?

Ch

A little background info: I have very irregular cycles. 15-35 days. Sometimes 2 week long periods. Tested negative for PCOS. Prone to BV. I’ve always experienced breakthrough bleeding from 3DPO on and off until AF shows up. Not enough to even wear a liner, usually when I push going to the bathroom. I have a short luteal phase of 10 days. I’m on progesterone suppositories (200mg) once daily after ovulation to help lengthen my LP and prevent spotting.

I’m currently 7DPO, BFN but it’s still too early. On and off the last few days I’ve had a weird sensation/twinges in my pelvic area. No other symptoms. Woke up this morning went pee, nothing. An hour later went to the bathroom (pushed lol) and starting bleeding. It looks too red for it to be implantation, but the bleeding has subsided and I have a little cramping.

I’ve never had this heavy of bleeding at 7DPO, but I’m assuming AF is coming early :/ Has anyone every experienced similar cycles to mine? Has anyone ever had “heavy” implantation bleeding?