Beth,
Is there anyway you can also have blood work done and check your potassium level? I think on my bloodwork it says potassium should range from 3.5-5.3. Mine was 3.5 so I just started to take one potassium pill (99mg.) a day to bump it up a little, I am also taking baclofen 10 mg once in the morning and once before bed. I just started talking the potassium and I'm hoping that after my levels increase I won't need the baclofen anymore. But, definitely call your Neuro... you should not have to suffer!!
~ Monique
Link about spasms/potassium:
http://www.acu-cell.com/dis-mus.html