10 day spotting but no period

[Jay612]

okay so let me start off by saying that i have PCOS. Ive beeb on Metformin for over a YR on and off. Since ive beeb using metformin my periods have been regular. my cycle.is frm 33 to 36 days.. so my last period was regular i got it sep8 - sep17. now on sep 26-28 i have brown spotting.. then it went away and on Oct 7 (Im still.on it and its oct 18)i started spotting again but jst when i wiped. 5 days into the spotting the color started changing to reddish pinkish.. its jst mostly when i wipe.. a panty liner will do for the day. does anybody know what this could be?
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[AttilaTheMeerkat]

I would get this issue checked out by the GP, spotting is often not serious but the cause should always be determined.