Hey Kelly,
I used to have terrible problems with spaciness.. Some of yours might be attributed to your medication (you might want to research the side effects), but I can give you a few suggestions that helped me tremendously..
First, I would cut excitotoxins out of your diet.. The two big ones are nutrasweet (aspartame) and monosodium glutamate (MSG).. You'll probably have to start reading labels in order to do this because MSG is in a lot of products, but I can't even begin to tell you how much doing that helped me and a lot of others on this board.. I know it seems like an inconsequential lifestyle change, but it really doesn't hurt to try it.. After a month of cutting out those two toxins (plus alcohol and caffeine), I felt like a totally different person..
Second, I would highly recommend doing yoga.. It helps increase the circulation to the brain (I'm assuming) because it helped completely eliminate my fibrofog.. I could finally think straight & I felt like a real human being.. It's amazing & it's very low impact so you can do it regardless of what physical shape you're in.. If you'd like to do it in the privacy of your own home, I would highly recommend the tape A.M. Yoga for Beginners for Rodney Yee.. It only takes 20 minutes a day (the majority of which is spend doing relaxation and meditation techniques) & you only need to do it a few times a week to experience benefits..
Anyway, they're pretty simple changes & they're probably worth a shot.. I know they helped me more than I can even begin to tell you.. I used to be a mental wreck because I was always so lightheaded, forgetful and I couldn't seem to concentrate.. Now, I feel a lot like the me that I used to be before I got sick..
I hope that helps!
Take Care,
Melanie