The trouble with self diagnosis of hypothyroid is that so many of the symptoms (weight gain, lethargy..) in 99% of cases are due to the stresses of modern life and lifestyle, rather than a medical condition!
The elevated figure you speak about is probably ESR - a non specific marker of inflammation/inflammatory conditions. 28 isn't massively high, and can be normal depending on age (i.e. would be fine if you were 50 odd years old...), but can be raised in autoimmune conditions.
Thyroid antibodies and hypothyroid - can get autoimmune conditions causing this (see Hashimotos...)
Of course, visiting a doctor again in real life may be beneficial again (say's he, typing this after finishing an endocrine clinic!)
DrP