As a mostly lifelong sufferer of a benign arrhythmia, I can sympathize. Be sure to express your concerns to your doctor. Advice given on forums should be used cautiously, and only after doctors have ruled-out more serious issues.
It's common for me and others to discuss our arrhythmias specifically, but truth be known, without EKG verification when they occur, we really don't know for sure.
"Symptoms of PACs
Most often, patients with PACs complain of palpitations. However, rather than reporting sustained racing heartbeat, they usually describe "missing" or "skipping" of the heartbeat. Some patients even feel that the heart has "stopped" while others describe a sensation of "flip-flop." This is due to the fact that the PAC comes too early (prematurely) in the cardiac cycle to have resulted in an effective pulse or heartbeat. Therefore, no heartbeat is felt until the next regularly-timed heartbeat occurs after a pause (so-called compensatory pause). Incidentally, the beat after the PAC usually occurs with stronger contraction than usual and can be associated with an urge to cough. Symptoms of PACs are virtually indistinguishable from those of PVCs as the physiological effects are identical".www.cardiachealth.org/premature-atrial-contractions-pacs
Presuming you are under the care of a doctor, and the doctor knows the frequency you experience these, the following page has always been a reassurance to me. My arrhythmia has always been identified as PVCs, with infrequent PACs. Concerning PVCs, this Electrophysiologist, a doctor that corrects rhythm disturbances via a process known as ablation, says that in a structurally healthy heart with no know deficit in the electrical system, that they wouldn't even worry about
correcting the PVCs until there's more than 20,000 per day. www.drjohnm.org/2013/06/benign-pvcs-a-heart-rhythm-doctors-approach/
Hope this is of some help.