Hy, Im A 25 Years Old Lady, And I Have

hy, im a 25 years old lady, and i have been diagnosed with pcos, my doctor has put me on microgynon for the last two years, however nothing has changed, my weight increases even as i diet and exercise, i still don't see my period. what should i do? i told my doctor that there hasn't been any changes but he gave me another prescription for microgynon again.