Oh man, forgive me...the brain fog must be kicking in again. YES, I have taken enzymes (duh!), but I'm not sure how much they helped me. In my case, what helped the most was cutting out dairy completely. Since you tested negative for food allergies , then I'm not sure what the cause could be. I think you're right that stress is a contributor. I wish you the best of luck on your journey back to health. Sorry I couldn't help you out more.