there isn't a person here who hasn't gone thru what you are experiencing right now. The 'waiting for the tests' part is the absolute worst! Scroll on down to the MS forum and read a bit about others who post, I'll bet you will find others asking many of the zillions of questions bouncing around in your head....and, find some answers as well.
Since I remember being 'new' at one time, I suggest you read the 'stickies' put at the top of each forum. Those are bits and pieces of info that other participants have found useful...and I'm sure you will too. If it's BLUE, click on to it and you'll get another web-site screen about something MS related. The more you learn the better YOU will be able to make decisions.
In the meantime, please take care of yourself.. and I hope you have a pain-free moment or two! - j