Lots of great advice here...we're a group who have been through very different experiences, but we're a great place for info, advice, and support from those who know what you're experiencing and feeling...
It's okay to be scared...but it is not okay to delay getting information that will help you and your dr. be better informed. If you don't want to go through an LP, I can totally understand that, but make sure you don't delay tests because you are afraid of what you'll find out. Knowledge is power, after all.
I was told in '91, over the phone, mind you, that based on xrays on my back, that the dr. felt I'd end up in a wheelchair from arthritis. Jerk. Some drs. tell patients things that have no basis, and needlessly frighten us.
I have days when I am afraid of what MS will bring into my DH's and my life...the unknown is the great equalizer in life...but at least we know what we are battling, and that there are drs. who are absolutely fabulous about taking the time to inform us, and to support us.
Keep us posted, won't you? We're here for you

P.S. I don't know the handshake, either