I have been experiencing the exact same flutters with my heart. I have had an ekg and blood work done and everything is normal.I have continued to have several flutters daily for three weeks now so they have ordered a 48 hour holter for me.good luck
The PAC was while sleeping. Despite noting many symptoms (including what i referred to as a flutter) during the monitor, the corresponding markers on the Holter were negative (normal heart rhythm).
I am 33 and I do understand that these things can happen in people of any age. I have a history of panic disorder but this seems to be similar but somewhat different.
You did catch a PAC, so there is a rare activity in your atrial chamber, perhaps there is also an occasional Atrial Flutter or Fibrillation. These two condition are more common in people of advanced years, say 60+, but can occur at any age.
Anxiety can be the driver, so do try to get that under control, with medication or meditation or whatever combination works best.
If the flutter continues, or gets worse, it seems to me a long term (weeks) monitor may be called for to be sure the activity is caught on a medical recorder.