I'm 2 weeks post TT and have been having diarrhea and now stomach gas that's quite uncomfortable.

If your vitals are stable, your urinary output good and urine light in color, and your diarrhea no bloody, you can consider stopping the sugar free Jello, use bulk laxatives without the water, and staying hydrated with electrolyte beverages such as  Gatorade and see if this gets better on its own.  If you are truly compromised in any way, you need to contact your surgeon for further advice and possibly an evaluation in the ER.

This is something that you need to contact your surgeon about ASAP, not physicians online who didn't operate on you or know your medical history, etc. You want to make sure also that you are not getting dehydrated AND are also having an appropriate nutritional diet that will help you heal quickly and well.Steven Turkeltaub, MD