Be sure to check with your doctor. It could be side affect of a medication, or maybe even dibetes. There are many other things that can cause those symtoms, and some may be controlled with your doctor's help. Even depression which is very common in the United States. Check please with your doctor, don't jump to conclusions. It all may be treatable. Good Luck
I am sorry..... there are differant exercises you can do may help, there is a site called Lumosity ' google it there are some little exercises and using the PC is helpful, Some hopeful news is that they are in the 3rd year of trials for a new Drug called Remba you may also want to google it ,as it has shown great promise even in reversing Alzheimers, if it passes FDA inspections it will be available in a couple of years ,So there is hope out there , we have an expert/Doctor forum aswell,,, go to the forums page and look for Alzheimers and click on the right, the Doctor may have some more ideas for you ..Good Luck