Hi there ~
I understand your concerns. I think that you have gastritis
. Having pain after eating and having to use the restroom are two different things however. You need to get H pylori testing done and then an Upper as well as a Lower GI endoscopy
done so as to find out what is going on with your GI system. A subsequent visit with an internist might throw light into the kinds of treatments that you might need.
I hope this helps. Take care and have a lovely day!