Ditto what Glenn posted.

You are showing poor B12 status, and could use an aggressive change in that. B12 is not a worrisome supplement with risks.
So start that ASAP oral 5mg daily on empty stomach--methylcobalamin type-- for 3 months. And see what happens with your PN symptoms. That reactive hypoglycemia? That is a prediabetic state, and studies show prediabetes starts the PN process. You can only benefit from the B12.
Puritan's Pride and iherb.com and places like Vitacost and Swanson's--all carry it now inexpensively. Pennies a day.
This week the news has been flooded with B12 preventing cognitive problems in aging people. It was even on CNN and has been posted here on the various boards more than once.
The NIH recommends all people 50 and over (symptoms or not) to be taking a B12 supplement.

The meds you list are typical for PN. But they do not restore you or help you heal, they just cover symptoms for the most part. Some studies suggest that the nortriptyline may encourage nerve growth in the periphery, but that is still experimental and rather new.

Start modifying your diet. Get rid of sugars and starchy carbs, which stimulate the reactive hypoglycemia. Slow carbs instead will keep your blood sugars from getting low... legumes, beans, nuts, fruit with fiber like peaches/oranges/berries, veggies, etc. Avoid fruit juices. Fiber in fruit delays absorption and moderates blood sugars.
Increase protein to about 40% of calories a day and use good fats like omega-3s and olive oil to keep food in your stomach longer so the blood sugar spikes at mealtimes will be lower.

I'd get an A1C run to see where you are in that department. A higher A1C can show you have spiking after meals, with high sugars followed by low. It is a good test to reveal how your diet is working for you.

It will be a battle on the thyroid issue. In my case I had a right sided goiter with my borderline tests. The doctor ran a radioactive uptake and found my left lobe was partly dead and hence my problem was "undiagnosable" but he gave me the hormone anyway because I had signs of hypothyroidism. I settled in at 75mcg a day after the first year and have remained at this level for a while now. Signs of hypo= intolerance to cold, the PN (I had carpal tunnel in my hands severely too), edema of the hands, face. And orange tinted palms and feet...this sign is very typical of hypo people...because the betacarotene in vegetables we eat is converted in the liver to Vit A...using thyroid. I had the orange tinting of the skin very obviously... along with brittle nails, etc, and he used that finding along with the radio uptake to decide to put me on hormone which actually SAVED me!

But unless you see a holistic doctor who does bioidentical hormone treatments, you will have a battle with many endos to get treated with your test results.