What you are experiencing is normal. As much as it feels abnormal, it's natural...for you, particularly. If I can switch it around to me for a minute: after both a work-up angiogram (catheterization through the wrist in preparation for an ablation, and then after the first of two ablations I had seven months apart, I had trouble falling asleep. Well, not quite accurate...i was sleepy and wanted to sleep, and did fall asleep, but only for ten seconds at a time. I would awaken gasping for air. I had what is known as 'sleep onset central apnea'. Central apnea, unlike obstructive apnea, is a problem with CO2 regulation in the blood, and the central nervous system doesn't respond to rising concentration of CO2. You don't breathe because you're running out of serum oxygen. You breathe because your levels of serum CO2 rise above a threshold and if makes you start breathing to flush more of it out! Strang, I know, but it's a fact. But, to continue, for several days after the angiogram and after that first ablation, I would fall asleep numerous times and then come awakes several long seconds later gasping for air. As you would understand, this was not fun. I was desperate to get some rest!
But my main message is that it passed. In both instances, it passed after a week or so. If things go well, yours will, too. What you must do is self-talk. Have a talk to yourself, aloud if it helps, and tell your mind that you have been relieved of AF, that you feel well, and that you have the best science and technology at your disposal for this problem. You are well, you are fed, you are clothed, you are sheltered, and you have the means to conquer the problems you encounter in your life. This is but one of them, hopefully to be a closed chapter after your Holter assessment showing no further arrhythmia.
Another strategy is to begin to claw back 'normalcy' in your routine and former practices and enjoyments. Make sure you get between 30 and 60 minutes, generally, of walking or aerobic exercise each day (if you have no physical limitations). Eat well....meet with friends. Restore your life to its former glory. You have been granted a reprieve and should celebrate. Allow yourself to feel good about your life, your overall health, and over your many successes, this being just the latest.