I have read many posts on the subject you bring up, so I hope you'll get some metrics from people with experience. Of course, the terms are very general. Some numbers like HR might be helpful in calibrating a response.
This happens to me everyday several times a day. And my heart seems to just be chugging along like normal and then I have those really hard beats. Not aware of any pauses or anything like a PVC. Got me...doesn't seem to do any harm, as long as it doesn't take off and go crazy, not going to worry.
its 153 am,im bored,looking on here,and i just had about 6 in a row same thing you are describing,,,only thing is ive been drinking sweet tea half the night..lol....ususaly some outer stimulent makes this happen,,,,relax,and rest assure,youll be here tomorrow.