I would not rely so heavily on your temps right now. I bet the vitamin D therapy is causing things to seem irregular as your body repairs itself.
Did you read the article that Kat posted about the possible link between vitamin D deficiency and infertility in pcos patients? I'm hopeful that this could get you ovulating on your own!
I had my vit D tested recently and it is the lowest my Rheumatologist has ever seen. He has me taking 50 k iu/week for 8 weeks, and then I'll retest.
eta: Here's the link in case you haven't read it:
Vitamin D could boost fertility in women with PCOS