Before you started eating healthy were you eating processed foods and sugary junk? If so how long?
Did your doctor do a glucose tolerance test?
Fasting is the best solution for PCOS, also important part of healing is to eat plant based foods after you complete your fast. If one fast does not clear it you may have to fast again.
Good start. Don't give in easily to symptoms of fasting, such as headaches, backaches, joint pains, nausea, etc.