Bleeding on 14 days of cycle suddenly.

I don't any history of irregular period. I have 1 kid. For 2kid just went for ovulations induction for 3 months. I was taking duphaston and post stopping it my last cycle period was on April 27. After that I did not take any medicine as my 3 cycle ovulation induction completed. In this cycle suddenly I got bleeding for 2 days on day 14 of cycle. I am posting this question second time. In my last question reply, I got answers from some of them that this might be due to withdrawal bleeding after stopping progesterone. As I have said, my last cycle period was on April 27 which was after stopping duphaston. So, that was withdrawal bleeding. Why again bleeding happen post 14 days of that? Is that due to progesterone supplements I was taking continuously for last 3 months, and since in this month I am not taking hence after 14 days progesterone did not generate by body automatically and hence bleeding? Please advice why suddenly bleeding happen?