1) No one is going to laugh at you. If you are having these symptoms they are serious and they could get worse if you do not get some help. Go see a doctor. Immediately.
2) I was diagnosed with MS at 17. So it is possible. I had numbness in my legs that spread and caused a loss of balance. One thing that I know about most MS symptoms is that they don't usually come and go. My numbness, for example, was constant. It didn't go away during the day, etc. so i don't know if yours are lapsing and returning or not but that's... what one thing i've heard.
3) A lot of those symptoms do sound like MS. I am not familiar with cases in which they all appear at once, though. My symptom (as you heard above) came by itself. But I am not a doctor and a doctor would have answers to these questions. I recommend you go see a neurologist instead of just your pediatrician/general practitioner, if you can.
Good luck. I'm praying for you. I know this can be scary but you will feel so much better once you KNOW. My scariest moments were when I didn't know what was going on with me and so I couldn't ... DO anything about it. couldn't take any medicine. couldn't take control back...
Confide in someone, get started on the path towards your health.
Keep us posted-- diana