About two months ago, I developed IBS-like symptoms. Constant diarrhea, bloating, extreme gas, rare (but not rare enough) incontinence and abdominal pain.
It was absolutely terrible and I couldn't imagine living the rest of my life like that.
However, I don't have IBS. What I did have - and still do - is inflammation and ongoing sickness from exposure to toxic mold. All traditional GI tests (i.e. stool tests, blood tests) showed nothing abnormal, but I had just gotten out of a condo with high levels of toxic mold. Testing confirmed that I was sick from it.
I'm not saying you do have this - probably most of you don't - but if you do live in a building with water damage, it is something you should definitely look into. Especially if you have other symptoms like fatigue, mold allergies, itchy eyes, etc.
My recommendation is if you do think mold might be a problem for you, really research it for yourself. There is a lot of misinformation and conflicting information out there, and I've spent hours and hours researching it and trying to figure it out.
I can say that I'm - overall - about 90% better now. IBS-like symptoms are no longer a problem. However, some other symptoms persist. I'm not done treatment either though.