Should I push my neurologist for further testing?

I hope I can get some advice here because I’m not sure if I should be asking my neurologist to do more than she is doing. I started with numbness and tingling in my feet on December 27. Over the next few days it progressed up my legs to my waist. I decided it is time to contact a neurologist, since this happened to me about 14 years ago. That first episode peaked at about 4 weeks, with the numbness and tingling feeling mostly on my skin. It gradually subsided after 4 – 5 months, and the neuro decided after inconclusive MRIs that a virus may have caused it. For this current episode, the neurologist ordered a cervical MRI which showed nothing, and is now sending me for a brain MRI. She also ordered bloodwork: B12 folate and lyme titer. She also wrote and crossed out a test for syphilis, not sure why? Still waiting on results for that. After she saw me, the numbness and tingling traveled above my waist. It runs up my back, the back of my head, a band around my face at eye level, down my arms, sometimes my fingers, plus a really uncomfortable band around my midsection. No pain, just numbness and tingling, feelings of hot or cold mostly in the legs and feet, some vibrations in the legs, and at times I feel weakness in the arms and/or legs. I can walk fine although my gait can be odd when I’m more numb, and my reflexes were ok at my visit. I never know how I will feel day to day. If I over exert myself I feel worse the next day. Sometimes I wake up in the middle of the night because the tingling gets worse. Sometimes it gets better when I move around, sometimes it gets worse in certain positions. There is just no rhyme or reason, and sometimes it’s really scary. I’ve read posts on the forums and it doesn’t seem nearly as bad as what many of you have experienced but can there be milder cases of CIDP or GBS? I’m pretty sure this MRI is going to show nothing just like 14 years ago. If it has any bearing, I did have a really bad cold the week before this hit, followed by severe exhaustion from a crazy family circumstances, so I was pretty run down right before this happened. I appreciate any input.

Thanks,
Dana