I’ve been on metformin for about 8 weeks now and my period has been very strange. I has bright red spotting for 11 days! Normally I get 1light day followed by 2 or 3 heavy days then it’s done. Pretty much since week 1 of metformin I’ve had off and on bright red spotting. I go to see my nurse practitioner again in September so I will ask *** is going on when I see her. For now I’m just logging all the info on my clue app as normal so they can see how it’s changed.