My neuro always orders MRIs with contrast...but some insurance cos don't pay for this, and some docs don't want to order them for some reason unknown to me...

I had a spinal tap. It was uncomfortable, and the good friends here and at other sites gave me great advice about lying flat afterwards for the rest of the day and drinking caffeine to avoid the dreaded LP headache.
My LP did not show any proteins, but symptoms later gave me the MS dx...if the neuro feels you are in a flare, then he would order the LP to confirm it.

Keep your symptom journal up to date, but don't forget to live life fully...

And we are here to help, give info/advice, and hugs