angry and distrressed

i went to see my neurologist today because i've fallen twice since christmas and he wanted to see me pronto.  besides hearing that the weakness in my legs has gotten worse (which i'd guessed) i found out that he wants to give me another mri which might or might not show something i'm also restarting pt for my legs.  the distressing part of the appointment was that he said that if the mri and pt don't improve things for me, i have to start cytoxin.  i was always scared about the chemo and now it's being brought up.  i'm about to have a meltdown.