I was going to say to lie and say you're TTC.
My doctor didn't want to put me on it either, so I started eating an extremely low glycemic index diet (essentially South Beach). Then, the one month I went off the low GI diet, I O'd really late - and I convinced her I didn't O because of the diet, and she put me on met.
You can always try the diet, and if it works for you you'll have an argument for your doctor.
I wish more doctors listened to their patients....we're in a service industry, after all....