Hi..welcome to the forum!
The rotten in the gut feeling is probably because the inflammation is now in a much less state and lower in the rectum.
Is your UC limited or throughout?
Are you still taking the Canasa? Remember that once you feel much better...to taper them down rather than stop abruptly. What did your doc suggest you do?
You might consider to take probiotics to help keep the gut flora balanced.
I would suggest you get to like 5ASA meds...I've used them for over 19 years...although I prefer to use the retention enemas rather than the supps.
The suppositories can be used twice or up to thrice daily.
The uneasy rotten feeling could be reflux? By your gut do you mean nausea or cramping or urgency?
*Heather*Status: mini flare Dec 28... tapered to every 4th night
~diagnosed January 1989 UC (proctosigmoiditis)
~5ASA: Asacol (6 daily) + Salofalk enemas (increase for flares tapered to maintenance)
~Bentylol (dicyclomine) 20mg as needed
~Probiotic 3(Natural Factors Protec) bedtime + 1 (Primadophilus Reuteri) occasionally
~multi-digestive enzymes as needed ....zymactive 3 - 5x daily
~Ranitidine,Pariet (reflux) Effexor XR 75mg; Pulmicort/Airomir (asthma)
~URSO for PSC (or PBC) 500mg X 2 daily (LFTs back to NORMAL!!)
My doc's logic.. "TREAT (FROM)BOTH ENDS" worth it !!!