Implantation spotting, if you've had it please comment

Short back story:

PCOS with 35-38 day cycles consistently

TTC 3 years- have already had testing, hysteroscopy,blahblahblah

Recently have gone back to school for my masters, this so taking a break from REALLY trying, we are simply just having sex when we want

Ok....this month I believe that i ovulated around the 6th or 7th due to EWCM, not temping, just based purely on cramps and cervical mucus and ive basically had spotting ever since right around ovulation I had pink ovulation spotting....for the last few days ive had extremely light, but consistent when I wipe brown spotting, and today (only 9 days later) I've got full on dark brown spotting like the end of youe period. Yes, i know this could be my period but it would be reallllly early for me. I'm hoping someone couod share their inplantation stories and give me some hope?

-thanks in advance ladies!