I was in the mid stages of dementia with severe vitamin B12 deficiency. There are more than 100 conditions from vitamin deficiencies to hormone deficiencies to rare brain disorders that can mimic Alzheimer's disease.
In fact, autopsy studies of nearly 1000 dementia patients at 30 top centers supported by the National Institute on Aging found that between 17% and 30% of those diagnosed with Alzheimer's disease had been misdiagnosed and had other conditions!
Cognitive impairment is VERY common with thyroid disease.
Please post the results of all your thyroid tests and include reference ranges because they vary lab to lab and have to come from your own lab report.
If your thyroid levels aren't adjusted properly for YOU, you will continue to have symptoms.
Do you have other lingering hypo symptoms?
On what basis were you diagnosed with Alzheimer's? Are you of eastern European descent?