How to treat light periods due to PCOS?

Hello doctor,

I went to the doctor last week for a checkup. I have a light period (usually my menstruation lasts for one or two days) but I get my period every month on the same date. I am facing this problem for about three years. Four years back, when I was 19 years old, I was very obese, and I weighed 187 pounds. Then gradually, I started losing weight by following some lifestyle changes. I followed a portion-control diet, and I lost 48 pounds. Now, I weigh 138 pounds. Last week, I went to the doctor since I am still having light bleeding during my period which usually lasts for just two days.

The doctor took an ultrasound of my ovaries and said that I have polycystic ovaries. She asked me to lose more weight, at least a minimum of 22 pounds. My question is that 10 to 15 days before my period, I have a bloating issue. My belly swells too much even if I do not eat much. My thighs also look big due to bloating. I cannot lose weight. It feels as if I have eaten a lot and my stomach too looks big. I am taking medicine Glucophage and Diane 35. After taking Diane 35 for about eight days again I experienced bloating issues, weight gain, and period cramps and I think it is an indicator of the arrival of my period. Please help me with this.