thank You so much for Your insightful response.
I have thought about it and think that “fear” is basically what is at the bottom of this.
If You suffer from intrusive thoughts or You have to fulfill certain rituals or both.
Fear is what drives it.
In my case I can see that a childhood with toxic parents and some traumatic experiences followed by drug abuse etc. could have caused enough potential to develop OCD.
It actually became really bad during an Interferon treatment for Hepatitis C.
This also destroyed my immune system and left me receptive for systemic candida.
Thinking about it, it all makes perfect sense.
Yes, I will definitely take an approach that covers more than diet.
Thank You for Your suggestions.
I forgot to ask what is CBT? Thank You.