Get a stool analysis done so you can prove to your mom that it is ” all in your Gut” not just “all in your head”. She needs to realize what is “all in your gut” can have a great impact of what it can do to your head.
People that try to use mind control over a serious health condition need to experience the health condition themselves to truly know what that person is really going through. Its easy for them to say “its all mental” when they are in a good state of health. If they were experiencing severe pain everyday and could not overcome it mentally they might change their way of thinking. Mind over matter might work for mild pain/symptoms, but will not work for more severe pain/conditions.