I can sympathise with you. I had the problem for over 3 years before I found out it was parasites...... I know you said you had the clear on parasites. So did I. They were completely wrong. I had 2 different tests done and both came back clear of parasites..but I have pictures that prove them wrong.
I have the pictures on my blog My Journey With Candida and if someone can tell me if I am able to link it here... I will do so.