I believe Dr. Wilson's protocol for those with Na/K inversions is to add in copper. I have had inversions twice, and both time I was prescribed Limcomin, an ARL supplement with 0.75 mg copper.
Overall, it sounds like you are in good hands. I have only used ARL supplements so I don't know what's in the SP ones you've been prescribed, though. Keep us posted on how you do. It's not an easy road but definitely worth all the ups and downs.