Hi, I'm just over 4 years post-op and have severe post-prandial hypoglycemia (after eating).  I've seen 8 Endocrinologists have had a zillion labs (all of which come back Perfect), we've tried Acarbose to slow the carbs from absorbing, had nuclear scans, MRI's, Upper GI's, none of which have explained the problem.  I was getting warning and I'm lucky that I have a service dog that could alert when my sugar was falling.  However, I have now been bottoming out without warning and falling a great deal, due to this I am no longer allowed to drive. 

The symptoms I experience when my sugar is falling are as follows: lightheaded, confused, headache, shaking/trembling, confusion, and disorientation.

I have researched until I thought my eyes would bleed, I have a whole packet I give to each new Doctor listing all the test results including labs, previous Doctor's contact info, a timeline of symptoms starting at the surgery date, copies of the abstracts regarding the limited number of research that has been done and a letter begging for help.

I wish you the best of luck and sadly the only advice I have is that you stay persistant, don't accept "I don't know what's causing this" as an acceptable answer, and continue to post because I truly believe the only way some of us will ever get help is through networking between ourselves.  Lorrie