WAIT for the MRI to see what they says before you start worrying about anything. At least your doctor is following what he is suppose to do.

The pilot we have on the boat last trip told me his mother had been diagnosed with parkinson disease and so had a good friend of his. He said his mother kept getting worse and worse and was finally hospitalized. He realized how much medication his mother was on and researched each and every one of them on the internet. He also researched Parkinson disease and found out the only real way to diagonse it was through a MRI and his mother had never had one... there was another so called disease she had been diagnosed with and recieving medication for so he researched that also and the only way to confirm it was a test that she never had. Armed with that information, he faced the doctor the next day and within 30 minutes, those tests were done. He also discovered that one medication she was recieving when combined with another her doctor had given her was a deadly combination. It turned out she had neither disease but the medication had already done harm and she died within days. (his friend had never had a MRI either)

So, ANY medications you are on NOW, research fully on the internet for side effects. Those shaking hands could be a side effect. Then research combining drugs. Look out after yourself, you have all the tools to do it with. ...and again, lay off the sodas, regular and diet. Get yourself on a healthy diet and stick to it. (I have been on a diet for these last 2 years, I eat ALL day long, just make healthier choices and can hardly eat all I list to eat in a day because I am alway so full. In 2 years, doing this, I have lost 40 pounds!) You are what you eat so watch what you put in your body!