Hi, I am almost 38 and finally got pregnant after about 2 years of ttc. I was diagnosed last year with hyperthyroidism, my TSH levels were 24, the normal range is 2 - 5.5. I took liquid selenium and kelp daily, it took a few months to work but now my TSH levels are back to 4.2. I would suggest getting your thyroid levels checked if you haven't already done so as that can cause fertility problems.
I finally got pg in May, I added B6 that month but not until cd14, only purchased it that day, so may not have helped. I started taking coQ10 the month before, found some lovely kids orange chewable ones, I'm so fussy. I bought some fertility stones on ebay that month too for $7, I was getting desperate. My next step would've been to buy a getting pregnant hypnosis cd on ebay. Have you tried using B6 and coQ10?
Good luck, I hope you get pg soon.
Trudi