having periods but not ovulating

Mehrnaz
Hi lady's,
​I'm new here. I have been diagnosed with pcos in 2009. That was after giving birth to my now 4 year old son. I'm having my periods just 4 time a year. My doctor said that even if I have my period, I'm not ovulating. His advice is too lose weight and see if my cycle is coming back before putting me on medicine. Is there anyone else that has the same problem?