The symptoms you mentioned.... the three poly's of hyperglycemia are enough to make you MOODY!.. If my sugar shoots high, which it does in reactive hypoglycemia...then I see spots before my eyes...but my sugar has to be above 250 for me to get any symptom. Then my sugar bottoms out to 20 or so.
From your report with a failing of the one hour GTT, you know your sugar is unstable . I have had problems with my sugars for 27 years...so I hear you. You have the symptoms of reactive hypoglycemia and gestationatal diabetes in early stages.
. It sounds like you need a nutritional tweak!
I would start with changing to sea salt and making some low cal gatorade.., this should stop the muscle cramps..... .Use unsweetened koolaid, sea salt and splenda or stevia/truvia to sweeten. These two sweeteners are a left hand sugar, which the human body does not assimilate, but tastes sweet.They are safe for diabetics. The sea salt naturally contains many essentials for the human body among them ...potassium and magnesium.and it is quickly utilized. start by making it up for a quart, add 4 servings/ according to container of sea salt. and If you use the stevia liquid, you should only need about 10-12 drops, depensing on how sweet you like your drinks. You can also make "gatorade tea" out of peppermint and spearmint tea..it goes in and is absorbed quicker in hot liquids and I have added sea salt to my coffee. to get in the potassium and the magnesium., especially if I have been out mowing for sevraal hours and need to rehydrate quickly.
Since you are pregnant, and if it were me...I would treat myself like I KNEW I had gestational diabetes.. its the safest thing to do for you and your baby.
To curb the cravings...go to wally world, get their liquid sub-lingual B complex.(6$) Put 2 droppers full under your tongue in the morning. for 3 days, should stop the cravings. then drop back to one dropper per day. Hold under your tongue for at least one min. then swallow the remainder. per day. You need a balanced B for this..(.Not a capsule! the B in most vitamins is destroyed in the stomach and small intestine.)
This will also boost your energy.
also drastically cut back on the carbs. try to keep them between 40-60 for the first week. then slowly increase them....to your tolerance.
Increase the fluids, as much high protein and liquid as you can get in togather...
.Can you drink milk, use yogart or greek yogart, cottage cheese?..the protein drinks especially... and the proteins need to be higher than those for weight loss......go for your minimum, then boost it by 20-30 Gms.