Bless you dearly in your treatments. We (my husband) recently finished our 6.5 year week chemotherapy and daily radiation and NAV testing too.. no results yet definitely been over 10 days, but sure they will arrive soon. I'm so sorry about the ringing in your ears. We empathize deeply and wanted to share with you .. after painful ringing, we met with his oncologist physician who made the decision to reduce Cisplatin chemotherapy regime by 10%, which is apparently a negligible amount, but did reduce then stopped the ringing. I would assume it depends on malignancy and location of the tumor, but just wanted to provide that as an option to ask of your oncologist. God bless you in this journey.