Hi girls. Can't add directly to this, but what you describe about blood sugar rings bells for me too. (definitely not the pregnancy part though)
Wonder if there isn't some underlying abnormality involving blood sugar issues that predisposes to or is linked with hypothyroidism too?
Its worth saying that it's very important (from what I've read) to ensure that you are not hypothyroid during pregnancy - especially not during a critical period around the start of the third quarter where rapid development of the thyroid and other metabolic regulatory systems is taking place.
The foetus relies on the availability of a generous supply of hormone from the mother to support these processes during this period.
I can't quite remember the details, but it creates a high risk that the baby will be born with a tendency to hypothyroidism (and potentially other issues) - possibly because some critical enzyme processes fail to develop properly. There's papers out there on the topic. (i might have a reference, but am not sure)
I'd love to hear of any insight you may have on the blood sugar/hypothyroidism link.
Hypothyroidism runs in one strand of my mother's family, and I was born very premature.
I've had some sort of problem with control of blood sugar levels since I was a kid, and eventually ran into the classic secondary hypothyroidism with thyroid auto immune disease (producing enough hormone, but not converting and using it properly) in my late 20s.
This despite repeated attempts to get a doctor to listen/take account of the symptoms over many years (they clearly pointed to hypothyroidism) was never diagnosed (the usual 'blood test say normal... beep' stuff) - replacement only started after a thyroidectomy for thyroid cancer.
It's always been the case that if I exercised without having recently eaten carbohydrates that I would run into a really severe problem with low blood sugar - with nausea, trembling, no energy, weakness (maybe even collapse) and so on.
I discovered while training and competing in sports in addition that the traditional carb loading procedure used by many before marathon/endurance type events left me feeling really ill and weak. (that's where you eat protein/no carbs for a few days, and then eat excess carbs in the day or two before an event - the theory is that the body stashes away extra glycogen for increased endurance)
It's also become clear that i start to feel very unwell after a couple of days on a low carb Atkins type diet, but that equally a high carb diet causes bloating and nausea - I find I need to manage my carb intake fairly carefully.
Sugar leaves me feeling very unwell, and upsets my already unstable blood pressure - which seems to be the result of cycling adrenal hormone levels. Which don't seem to be the result of stress.
It's possible that the above is by now all mixed up with some food sensitivities - I tend to minimise my intake of stuff like wheat, bread, milk, sugar and so on.
While ill before the thyroidectomy I had a couple of supposedly thorough work ups for the various endocrine conditions (Cushing, Addisons, suspect adrenal tumour etc etc), and was tested for diabetes etc. All negative.
I explained the blood sugar issue to the consultant, but for whatever reason it didn't seem to ring any bells for him....