Reactive Hypoglycemia

Dear Crippled,
I am not a doctor but do have reactive hypoglycemia and my fasting blood sugar level always has come up fine, around 90. I also have no sugar in my urine. This has been confusing and frustrating, and it caused me to go 5 years without a diagnosis even though I could tell something was wrong. My doctor then suggested I check my blood glucose at home, which I did. Before my home glucose tolerance test, I checked out my blood glucose meter during a lab test for blood glucose I also had. During the lab test I took a sample with my own blood glucose meter, to check mine for accuracy. Then after I found out it was only off by 1 point from the lab's result I figured it was very accurate. I gave myself an oral glucose tolerance test at home, which is not recommended since it's safer to have it done in a hospital. But since no hospital was apparently forthcoming, I went ahead and did it at home, using my blood glucose meter every 15 min and also using it when I felt symptoms, after eating 80 mg of glucose all at once (I ate a little too much, I had read that the oral glucose tolerance test (OGTT) calls for 75 mg to be consumed, and purchased 80 mg of glucose, which is one tablet too many, but I forgot and ate the last tablet too). The tablets are sold for diabetics. I took them fasting, before eating anything else that day. I kept sampling my blood glucose level for 6 hrs. I also sampled any time I felt a different symptom occurring and made notes. My blood sugar went right up to 199 at 65 min. after taking the glucose and after that saw it go down rapidly at times. I became very shaky at the point of lowest blood sugar, which was 43 after 3 hrs. total time. Then it went up again and tapered off at 66 at 4 hrs. I made a chart and showed it to my doctor and she used my chart for giving me a diagnosis of reactive hypoglycemia.

Later I asked my dr to please have the lab check also for insulin level when testing for fasting blood sugar after reading that suggestion on the internet. She agreed and and my fasting insulin came back nondetectable. The tests were repeated and came back the same. She said having nondetectable fasting insulin was not normal and for this reason sent me to an endocrinologist. I forgot to ask the endocrinologist what it meant to have nondetectable fasting insulin but I think my not having fasting insulin would account for my blood sugar going up to 199 initially during my home glucose tolerance test. Then apparently my insulin came back too heavily because my blood sugar dropped too fast and too low. This helps me understand my symptoms after eating things better.
Best wishes,
Cindyo