What Causes Irregular Periods And Discharge Between Periods?

Hello doctor!! I'm 25 yrs old.. I have irregular periods and i have a white discharge in between periods. I even feel wet and it smells bad sometimes. Is this an infection? What am i supposed to do? when i consulted the Gynecologist she said i had Poly cystic ovaries and prescribed me triquillar which helped me regularise my periods. I'm now prescribed Fertyl and Dexona to help in concieving. What is the actual problem and is the medicine I'm taking appropriate????