Thank you very much for the useful information Jill.
Well the first thing i would like to rule out is an un-diagnosed and/or under-treated thyroid disorder. This is a very common problem especially amongst females and give you severe lethargy and fatigue.
Different labs have different reference ranges for TSH (thyroid test) (usually 0.5 to 5.5); but recently new guidelines for the upper level of TSH have been set forward. The new upper limit of TSH is 3 as per AACE (American Association of Clinical Endocrinologists). Many doctors are not aware of this, so if you have a Thyroid test done, please review the report and discuss with your endocrinologist. If not done already, have it done and get the report interpreted keeping in view these details.
Other causes for similar symptoms (lethargy and excessive fatigue) include autoimmune disorders like Addison's disease (that can be associated with hypothyroidism), which can also present clinically in a similar way.
Vitamin D deficiency, a very common finding in all the age groups can also cause excessive fatigue and lethargy.
Sub clinical viral infections (but fatigue due to this is usually short lived lasting for few weeks), chronic fatigue syndrome etc should also be included in the differentials.
Talk to your doctor regarding all these possibilities and proceed with necessary tests.
You and your doctor working together can chalk out a best management plan that will suit best to your need.
Until you see your doctor, following measures will be helpful;
Gentle stretching of muscles
Vitamin E (400-600mg daily)
Co-Enzyme Q-10 will also provide a symptomatic relief.
Also, sometimes clinical depression can give you fatigue and exhaustion, but we need to rule out all other possible causes for your symptoms before attributing this to depression.
I would have been worried too if I were at your place, but let me reassure you that this is a treatable condition and carries a good prognosis with appropriate management.
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