<p>I agree with the suggestions of probiotics, real ginger and real peppermint in tea or some other form (candied ginger is easy to find), and Metamucil (or psyllium). You could also try taking a leaf from the morning-sickness playbook and keep some saltines by your bed. Some people find that munching a few of them helps settle the stomach.</p>
<p>It does sound as if your medical practitioners are not taking this as seriously as they ought, given your level of discomfort. Keeping records might help.</p>