Hello @csmith910, I know it must be really frustrating having constant dizziness and still no answers. My daughter had similar symptoms but it wasn't constant. After a few years of fainting episodes we found out she had Long QT Syndrome which was diagnosed by a Mayo cardiologist. I'm sure you have probably done a lot of searching but if not these Mayo Clinic references have some information that may be helpful:

— Dizziness – Symptoms & causes: https://www.mayoclinic.org/diseases-conditions/dizziness/symptoms-causes/syc-20371787
— Symptom Checker – Dizziness in Adults: https://www.mayoclinic.org/symptom-checker/dizziness-in-adults-adult/related-factors/itt-20009075

Have you thought about seeking help at a teaching hospital or major health facility like Mayo Clinic?