Does my friend have MS?

She seems to have a lot of the symptoms that I've researched. She forgets things frequently. Yesterday, she seemed to be having muscle spasms and was talking about feeling like she was burning up even though we were at a cool lake. She said it hurt too much to move. She said the trees all looked like a blur. Later, she was having a hard time keeping her balance and generally just moving. This isn't the first time this has happened. She also is allergic to a lot of foods, which could be related to MS. Because of this, she has a kind of avoidant/restrictive eating disorder, which could be making things worse. She also doesn't get enough sleep. The only thing that makes me uncertain is that her flare-ups only last a couple of hours. We are also teenagers, which could mean it will get worse in the future? I wanna know what I can do for her.