I have PCOS and I have hardly had a period on my own so doctors gave me medicine to start a period. I had it for 12 days. I got it on December 6th until December 18th. About 4 days aroundJanuary 14th I started to spot and very happy thinking my body produced its own period for the first time in a while.. the next day it was pink and I've had NOTHING since. Again 2 days ago started spotting and nothing. What could this be ?