Welcome to the forums! You will find great suggestions here and lots of support!
I understand your reluctance to take mediciations, especially the psychotropic drugs. Many folks who have found these drugs helpful need only take a very small dose so the effect on the patient is not as extreme as if you were being treated for depression. I don't think I buy the theory that, by taking these drugs, you will render the body incapable of producing them on it's own. As it stands, the theory is that your body is CURRENTLY not producing what it needs. Either way, it seems like you wind up in the same dilema - no seretonin. It reminds me of the argument about laxatives. For the many who can not have a bm on their own, taking a laxative is going to be a necessity, even if that means it may render the bowel incompetent on it's own. If the gut isn't working, what choice does one have?
After 3 decades of dealing with IBS, I can testify that ALL treatment options only last temporarily. I have tried them all. Some provide relief for a time and then quit. Same goes for diet. I might find something that "works" for me, incorporate it into my daily meal plan, and find that after one week, it is no longer effective. It is the nature of IBS. It is not "curable", only "treatable".
I completely empathize with this statement: