Can you have multiple sclerosis at an early age???Please help!!!?

when i was 16 yrs old i went overseas and came back to the US when i went back to school i started to have headaches because i would see everything doubled..i went to my primary doctor and he says that i am fine there is nothing wrong with my eyes..i took couple days off of school so i can concentrate on my vision, so i went back to school and couldn't see again and that is when my dr. told me i have to go see a vision dr. so i had an appointment at childrens hospital cuz i was only 16 at that time and as i came out of my house i fell down the stairs and culdnt walk again...my mom and sister had to pick me up to the hospital:( as i got there they did MRIs a spinal tap and c-t scan and everything was normal and i was unable to walk for 2 weeks:(..i stayed like 3-4 weeks at the hospital:( so depressing 3 weeks after i went home i decided to go back to school and at that time i got double vision again:( i went back to childrens hospital and they did new MRIs and it showed scattered parts in my brain:( so that is when they think its MS...i dont believe i have MS cuz at the age of 16 isn't it too young??? do u think i have MS and what do u think i should do..they gave me copaxone but i refused to take it cuz i believe i am too young to take the injections...Do u think i have MS..please help..im getting depressed just thinking about it:(