You don't give your age, gender, past history, family history, etc.
Neveretheless, an initial ablation procedure often does not solve the problem, and a 2nd procedure may be necessary. Though you were told the ablation was successful, I don't know why your "flutters" continued and apparently increased in frequency.
I am unclear as to the type of ectopic heart beats you are experiencing. And I don't know the origin of your sharp chest pains and a feeling of pressure on the chest.
You need clarification of your medical condition - including the nature of your "flutters" and ectopic heart beats, and your chest pains of variable nature. Certainly this calls for a proper diagnostic approach from your physician.
Please be aware that I am unable to diagnose medical conditions online.