Looking at your levels, you aren't hypo but rather, hyper. You are probably overmedicated and need to come down slightly.
T3 is not going to be of any value to you as your levels are indicating your body is making more than enough at this point.
Your memory skills etc, may be helped by taking something else. Gingko Biloba is excellent in helping memory. Do be aware if you are diabetic, or have bleeding problems or seizures then this is not for you. There are many over the counter health food store products which can help.
You could try some Brain Training excersises too. I do these regularly when I feel my memory is lapsing and find they help enourmously.