this whole process can take upwards of 2 yrs. sorry.
it's common to be denied on your first try. i was too.

make sure all your drs are on the same page, especially your pcp and neuro.
make sure they have documented this in your chart. make copies of everything even if you have to pay for them.

then contact a disability lawyer and employ them to file your appeal.
they will take a certain % from any benefits you're initially paid. you don't give them anything up front. and they will usually do a free consult.

i can't emphasize enuf that your drs have to back you up and have their results in your chart.

good luck. and i agree. don't give up.