You must consult a doctor first about this instead of running your head with questions, as it is very important to get out of it soon before any bigger problem.
There are gas pains but it can be a sign or symptoms of GERD too. So it is necessary to check your self properly.
my husband had gastrectomy also he is on feeding tube totally off solids! Just wondering if you are on j-tube?
Well, my Grandfather was on this tube and he was totally on off solids and, this tube is inserted through abdomen to the second part of small bowel to carry the feeding well. it requires proper checking, cleaning and dressing in time, and for this it requires to check the skin around the tube and need to look for the redness on skin, leaking or drainage which is very important to observe.
Sometime J-tube(jejunostomy tube) may gets clogs that needs alternate flushing through water and aspirting with the syringe.