High BMI Dr will not treat

Louise
Hi,
So I was diagnosed with PCOS last year however I have always had very irregular periods. Finally I got referred to the infertility clinic. She informed me that she would not put me on medication as my BMI is high and I need to lose weight until I get to 9stone. I am overweight but I would not say by looking at me that I was massively over weight.  I am still is size 12 -14 clothes. I have managed to lose a stone over the past month. But it's so frustrating that I can't be administered medication. We have now been trying to conceive for 3 years. I was just wondering if any of you ladies had to be in the normal BMI area to be prescribed medication? 
Thank you in advance