I used to have a very sharp memory and attention to detail. Today I can't even remember the last conversation I had with my wife and I constantly skip words and letters. I also have significant word-finding difficulty (mostly in speech).
There are two things I've done to help remedy this which may be of use to you: 1) learn something new and challenging on a quarterly basis like an instrument or wood-working and 2) Adderall. Go get evaluated for ADHD, because it can easily co-exist with the MS undetected. It's worth looking into I think.