What kind of b/w did your OB/GYN do? A u/s alone is by no means enough to dx PCOS! I was dx'ed the same way (u/s showed "cysts" on my ovaries) and went years without realizing my hormones were so screwed up.
Depending on what your hormone levels are, there are so many different options! Glucophage/Metformin is a popular treatment for IR, irregular cycles, and PCOS in general. Aldactone/Spironolactone, Flutamide, Vaniqa, etc. can be used to treat hirsutism and hair loss. Provera can be used to induce periods. There are also a number of alternative therapies you can try.
Definitely find a new doctor who's willing to listen to you and help you find the right treatment for your symptoms. Many women have luck with endocrinologists or reproductive endos but I was lucky enough to find a knowledgeable OB/GYN.
Hope that helps.
