Kindly provide the report of your cardiac echo....
Thank you for sharing your concern with XXXXXXX
I have read your medical history carefully and feel sorry for the situation you are in.
As you are having persistent (chronic) afib, it means that re-modellation of cardiac atrium; there is difficult to get your heart rhythm back to normal again.
You can succeed only for a while as you did until now, but the chronic damages have caused remodellation which is irreversible unfortunately.
It is good that your INR is between 2-3, protecting from bleeding episodes. You should keep monitoring it together with heart rate
With regards to ablation, I'd gently ask to have your cardiac echography, as I need to know the changes of your left atrium.