I Had RFA Occipital Done On Both Right & Left

I had RFA occipital done on both right & left side, within 2 months. I have had inretractable migraines for about 3 yrs, Have tried all of te prevention meds without success. Iam prescribed both Imitrex & Zomig. I seem to be having some side effects to the RFA. Some blurred vision, unsteady gate, delayed thought processing. these symptoms are not continuos, but unsure if this is normal