Flecainide is commonly prescribed as an anti-arrhythmic drug. Widely used. Tolerated by most, but some cannot take it. Of course there are several others, and if Flecainide can't be used by your body, your cardiologist will ask you to try others. FYI, we're talking about Multaq, Sotalol, diltiazem, propafenone, and Dofetilide. Ideally, you will respond to one of those. If not, you may be prescribed amiodarone, but that's a whole 'nuther ball of wax that you would only be asked to take as a last resort. You can google it.
Each of us is disappointed, maybe a little frightened, by having the diagnosis and then having to take two drugs for AF, normally both a rate control (calcium channel and 'beta' blockers like metoprolol or Sotalol), and usually also a 'direct-acting oral anti-coagulant' (DOAC) for reducing the risk of stroke...which is about six times what a normal person would have at any age. But, it's our new reality.
It is good that you are in the paroxysmal stage, the first stage, where your AF comes and goes on its own. At some point in the future, you may find that drugs don't control it well, or as much. There are other drugs to try, but you should do some googling of 'electrophysiology' and 'catheter ablation'. The EP's do catheter ablation in an attempt to stop the electrical signals from causing your atrium to fibrillate. I have had it done, and so have many tens of thousands in N. America, millions around the globe. It's almost routine, day surgery, and it usually does a great job of blocking those signals....meaning no more fibrillation. Sometimes it also means you can stop taking all the pills, but we can talk more about that in later posts...if you are interested.