Suggest Treatment For Frequent Constipation And Gas

I have been having this problem for awhile now. When I eat something, soon after when I have the urge to go to relieve myself, it will start to pass pretty good, then all at once it will stop just like you would cut off a valve. I immediately start to hear a gurgling sound like water filling back up in a bottle. Then I have such pressure in the middle of my stomach which is pushing down to where it feels like it is trying to come out but something is blocking it. When the gurgling starts it comes back up and spreads across the top of my stomach which sometime bloats me across the top and sometime causes pain or shortness of breath. I feel so stuffed and uncomfortable. I swell with gas and then start to belching unbelievable. I never feel completely flushed or empty. I drink MiraLax and take fiber meds to help out. I even take laxatives to help get some relief, but I still never get a empty filling. I am diabetic and I worry with some numbness from a thyratic nerve damage. I have neuropathy in my thighs and legs and I am scheduled for surgery next month to have discs reinforced in neck to keep me from becoming paralyzed from the neck down. So now, I really don t know what is to do about anything. I don t know which problem needs to be address first. If you can help me, I would greatly appreciate your advice.