4 abnormal MRIs

I have had 4 abnormal MRIs. They found white spots or lesions in my brain.They thought i had MS. I also had a lumbar puncture, evoked potential,and a full neck and spine MRI which all came back negative for lesions and MS. Thats what I was told by my neurologist. I do also have  Migraines, high blood pressure, Diabetes type 2 , Hypothyroidism, Fibromyalgia, and severe feet pain, and probably some nuropathy in my legs and feet. I have lots of memory loss, short term specially. I have trouble making everyday simple decisions, my speech is affected. I am fatigued constantly, tired all the time, and am afraid to go out alone. I have fallen down a couple times, but not recently. My quality of life is not good for being only 47 yrs. old. I have been told that some of the lesions or white spots have gone and some new ones have come. And I have been told that the spots are still there too. I have also been told that I do not have any autoimmune diseases. I feel like i am going crazy! What could possible be worng with me? Could I still have MS? Or maybe something else? I have had so many tests done and no one seems to know what wrong with me! Can you help me???