Hey there! Sorry you´re having such a hard time. I have PCO with a healthy BMI too, so can totally understand!
Do you know if you´re actually ovulating? If you´re on CD112 now, it´s likely that, when your period does come, it will just be because the lining has got too heavy and so has shed for that reason, not because of ovulation. Sorry if that´s not what you want to hear. You could ask your dr to presrcibe progesterone to induce a bleed, so at least you can start from a clean sheet?
I really hoped that I could resolve by PCO naturally and tried everything. My dr put me on Agnucaston (1st 1 pill a day and then 2), but that didn´t really do anything. I would´nt take it without discussing with your dr first though, as in some cases it can really mess up your cycles even more. The same goes for taking any other herbal remedies which are often recommended on the internet.
Things you can do which shouldn´t cause any problems are trying to cut down on refined sugar (even if you are a healthy weight) due to the insulin resistance often linked to PCOS. Taking 1/2 tsp of cinnamon every day is also supposed to stabilise blood sugar.
There have also been Italian studies recently that taking Inositol (2-4 g a day) can help bring on ovulation (or make it come earlier) in patients with PCOS. Apparently there are no dangers to taking this dosage as it´s essentially a B vitamin. I tried it for a few months but didn´t really feel it made a difference. There are lots of positive reports of it working though.
A useful site (which also has an article on Inositol) is PCOS Diva. This is written by a lady who eventually got pregnant naturally with PCOS after having fertility treatment initially. It has loads of advice which might be helpful to follow whilst you waiting for a referral.
Hope this helps a bit.