New problem!!

I have started having loss of feeling in my legs. It was first just in my feet but lately it has moved up to the knees. Now I wasn't to concerned about the falling but as the feeling was being lost I started falling more and more. I have seen my nurse at my primary care team and she is very worried but we can't get the doctor do do anything or even see me before the 21st of this month. Now on Wednesday I started having muscle spasms in my legs and up through my back. I've never had this kind of muscle spasms in my life. I haven't been able to do much walking since they hit. I can just barely make it down the hallway of my home. I'm not sure what to do next. My nurse knows what's happening but she can't get the doctor to listen or something. I'm beginning to get somewhat frustrated.
Any idea what my next move should be? I've tried to be careful as I don't need to get hurt, but I did have a bad fall tonight and that has me worried.