Sunshine -
Fatigue, weight gain, depression, constipation, dry skin, thinning hair, mental "fog" - all possible symptoms of thyroid disease.

Most mainstream doctors do not treat thyroid disease adequately - look at that Stopthethyroidmadness website for more info. Also, at least one out of five thyroid patients also has an issue with gluten sensitivity (1 in 20 have full-blown celiac disease). Every thyroid patient should be tested for celiac disease, and if the test is normal, then they should try a gluten-free diet for a month to see if they have milder gluten sensitivity. (Don't do the diet before the test, as the celiac test can be negative if you're not eating any gluten).