I too have Hashimoto's Thyroiditis. For the longest time I thought I was loosing it, but I came across a website called Thyroid.about.com and I was relieved to read that there are so many other thyroid suffers out there who experience memory problems. The site calls it "Brain Fog". That pretty much describes it too! This site is very informative and if you have the time read the book written by the website director on Thyroid Disease.