Re: Memory loss
Great reply post, but I have another take on it. Daughter also suffers from a memory loss after her initial bout of lupus a year ago. Curiously, she couldn't remember some of her times tables (she was teaching times tables to another child at age 4!), yet retained the ability to do calculus at age 16!!! It is sooooo weird. Had to re-learn what she forgot. Also forgot acquaintances names, and sometimes places, and the "I don't know where I know you from..." syndrome.
Anyhow, her MRI's always come up clean. I am currently pushing for a PET scan for bloodflow problems. I have been pushing for this test since November. Anyhow, add to the mix she too has some small hand tremors. Was told by the neuro and the rheumy this might be peripheral nerve damage and may/may not improve.
So, you might be in the same boat as my child. It doesn't hurt to err on the side of caution, however, and take extra tests. I would if I were in your place, and I would ask about the PET and do some internet research. Good luck to ya!