I'm looking into this also. Recently I was reminded that thyroid can cause these issues. I know T4 thyroid and vitamin B3 are manufactured in the gut. You might try to supplement with B3 and/or Tyrosine (for the T4) and see if that helps. It's possible the diflucan might have killed off some friendlies in your gut that were producing these.
Thanks for your suggestion! I will definitely try supplementing with B3 and Tyrosine and let you know if it helps! I was also thinking maybe I have abnormal gut flora. Do you have a similar problem to me?