Hi navecb and welcome to the Chiari forum.
Chiari symptoms do cycle and flare.....so this is typical for most of us...and this is what can make getting a DX difficult as there are more with this condition then there are Drs well experienced with it.
We do have a list of Drs other members here have been to, treated by and liked....I know there are Drs in Pittsburgh, Ohio, and Maryland....let me know what area you would like the names for to research.....not all on the list may be true Chiari specialists...so you will need to see a few and compare them....and to do so, educate your self on Chiari and ALL related conditions to help you know when you found the right Dr for you!