13dpo ish help! Implantation?


I have pcos but took opks this cycle as ive started seeing the fertility dr and looked like i had a peak on cd17 at 10dpo pm i had light pink spotting mixed with cm then turned darkish brown on 11dpo. On 12dpo it went light now on 13dpo its basically gone just a hint on the end of a tampon?? Im soooo confused as i thought it might of been AF starting weirdly early but no blood at all??

I had AF cramps in bed this morning too and i thought for sure it was on its way...scared to test

Is it possible implantation occured??

My nipples have stopped hurting.