Losing weight will definitely help you with PCOS
and irregular periods
so although hard I would encourage you to keep trying.In the meanwhile you can take medicine containing cyproterone
acetate and oestrogen like Diane
35 . It is a basically a contraceptive
which will regulate your periods and also help with acne
and facial hair. It won't help with libido but if you feel better about yourself that might itself raise your libido. Ofcourse as the drug is a contraceptive you cannot take it if you are trying to conceive.
Let me know if you have any more queries.