you might also consider a checkup with your pcp. usually easier to get an appt with pcp than neuro. altho i agree calling the neuro too. maybe another med might need to be tried.

however, not all sx's are MS. that's why seeing your pcp might prove helpful.
like advice to beth, checking mineral and electrolytes may show that you're depleted of something that muscles need to work well.

it's worth a try.
i can appreciate how bad muscle problems are.
please keep us posted. make that appt tomorrow.