I too have had hypoglocemia for almost 20 years now ~ when I first starting having the symptoms, no one even acknowledged that low blood sugar was a desease. At least there is more information out now and even several books on the subject that should be able to address some of your concerns.
My personal research has led me to believe that the inability to lose weight after awhile is due to the extreme stress the pituitary and adrenal glands endure from always being in alarm or crisis mode trying to regulate our insulin and sugar levels. After awhile, they become exhausted and depleted and them our thyroid stops regulating our ability to lose weight ~ so no matter what we eat, drink or abstain from, losing weight never happens.
I have been looking in to finding support for my thyroid (natural and holistic) and have heard many good things about Armour Thyroid support and will be ordering some soon.
I have also taken some steps to help assist it in the meantime.
#1.) Anytime I know that I will be eating or drinking any simple carbs or any carbs that break down into simple sugars quickly,i.e. fruit, wine, sweets, etc... I take one to two teaspoons of cinnamon (in an egg white or whey protein shake w/ NO SUGAR only Stevia)
prior to imbibing.
#2.) I am starting to spend 10 minutes a day with my feet elevated up against a wall and my head down. This is said to elliviate pressure away from the thyroid and give it
the needed "pressure" from gravity to help
it start to rejuvenate itself.
Of course all of this is useless is you are not watching your diet closely and doing your
part to avoid eating foods that you KNOW will aggrevate your symtoms.
#3.) Try you best to get 30 minutes of moderate exercise daily MINIMUM.
I know that sometimes we are so completely wiped out that just getting up to go to the bathroom is exhausting ~ but I have found on the days when I feel an episode coming on, if I take a walk immediately ~ it helps tremendously.
I hope that you are feeling better ~ and in the meantime try to avoid all colas's soda's, coffee,sweets, fried foods (this is key) alcohol and refined flours and sugars.
I know it is a lot, but you have to take care of yourself. If you are ovber 35, I would do a thyroid test to see what it comes up as ~ It could'nt hurt!