I have PCOS.... ive always had irregular periods. 6 months ago my OBGYN gave me merformin for my insulin levels and balance my hormone levels.... my period has been coming on and off on time lasting for 5 days... ive been doing very good... 2 days right before i was done with my metformin my period was late.... it was suppose to come on oct 27 but it didnt come on until 8 days later.... it came on but it was irregular. Spotting first then dark blood for 2 days and light flow... then on day three it was slowing down even more and went off my the end of day 3.... first time in a long time since i was this late and irregular. Is this normal??? What to do?