Cant balance on one leg with my eyes closed for more than a couple seconds. is this normal?

I wouldn't consider it normal. I would consider it a good reason to write down a list of any symptoms you have & take that list with you to an evaluation, so you don't forget anything. After a review of your list, exam and testing this can be sorted out.

Theoretically, should be able to do this for about 15 sec., but in elderly patients, this tends to deteriorate fairly rapidly. There may be simple reasons compromising your balance, such as a B-12 deficiency, and your doctor could check this and other possibilities quite readily.