Jo, I’m so sorry you went through that. You’d think an oncologist would know better than to say “You’re cured!” to ANY cancer patient! Ever! My mother-in-law had melanoma in her 50s. It came back thirty years later and killed her. The best cancer patients can hope for is “No evidence of disease” (NED). If you are NED for 5 years, then you are considered to be “in remission.”
God, I hope you find a decent oncologist. Keeping my fingers crossed for you.