Might be some mix up in terms, perhaps you had atrial fibrillation, and now have developed atrial flutter? They are different. Presuming your Doctor is using an EKG to determine the atrial flutter diagnosis, and perhaps medications are being used.

Hope you doing well and obtain treatment for the a flutter soon!

Apparently atrial flutter can appear some months or years after ablation for atrial fibrillation. https://www.ajconline.org/article/S0002-9149(19)30992-0/abstract

In the educational process and consent for ablation to treat atrial fibrillation, was mention made of possible later appearance of arrhythmia such as atrial fibrillation or flutter or tachycardia?

I hope you update us later on treatment(s) and results.

Best wishes!