Hi everyone

We have been TTC for 10 months I have PCOS so it can be difficult. I just finished my green "fertile week" according to glow(and made sure to TTC every day) 2 days ago I started with light pink discharge when I wiped then yesterday and today it's been brown I am not supposed to get my period for another12 days so it seems too early for period but I'm not sure, does implantation bleeding last multiple days??? My PCOS usually causes me to not get my period not this crazy early stuff so I'm just curious!