Foul smell could indicate an infection - get checked out for pathogens! (esp c. diff)
I absolutely feel you on the cognitive decline part.
If it's any comfort, even science has found that Crohn's makes you stupid:
/www.sciencedaily.com/releases/2016/08/160824140049.htmCheers for the recs. I need to get on it. And would if I could stop wasting time on the internet and playing video games <_<.