So sorry that it's taking so long! Very frustrating. I have the same situation, I can't believe my baby is over 2yo already and I still am not pregnant with a keeper! Has never happened before, blech!
Hope it will be your time really really soon!!!! I agree on the b vitamins, maybe try some vitex too? Another thing to try would be light therapy, make sure you are outside for at least half an hour in the morning. That has really helped me to decrease my cycle length.