Anechoic Follicular cyst in left ovary.

In my latest ultrasound it is found that left ovary is mild bulky in volume and shows Anechoic Follicular cyst measuring approx 10*9mm. I got spots after 10 days of cycle for 5 days along with restless ness. Again after in regular date I started spots a mild bleeding in 2 day, with so much of mood swing, pain, weakness and restlessness. Due to this I went through the ultrasound on 4-5 day. I have a 13 month old baby and she is taking feed. During the time of dilivery I had only 2 days of bleeding and after that my periods come again after 6 months (when my daughter reduce taking feed). After 8 month of dilivery again weight gain started. I visited Dr and I perceive me PCOD 3 months contreseptual pills. After that my weight lil bit come under control. Earlier also, I had taken PCOD treatments and stop this after getting cure. Now suggest me what should I do, as I read on google it can also cause cancer. Some time back I also had problem of vomiting without any reason. Thax in adv