I have glaucoma, degenerative disc disease, herniated disc at L5 impinging on S1, serum negative rheumatoid arthritis. For the past two years I have been getting a lot of headaches, fogginess that often causes me to be weak or loose my balance. I have fallen several times. I had a CAT scan of my head done and nothing was found. I also get lumps that form on the back of my head, hurt for awhile and then go down. I have had a hysterecomy where they took out 13 tumors and my cervix. I also have medullary sponge kidney disease. I have had several stones in the past, the last one gave me blood poisoning and I had to have a lithotrispy to get it out. Ever since the blood poisoning, I feel weak, and my other symptoms seem to have increased. Can you tell me what to have my doctor check for? She can't seem to pin point a problem.