Hey there Hopes,
I know how incredibly frustrating these episodes can be, I just had a weekend full of 'em (PACs or PVCs every other beat, round the clock!). And I can't even take a beta blocker for them because that would cause my heart rate to drop too low (my resting pulse is normally around 55 and drops into the high 30's with a beta blocker - not so good).
So, I have a system to try to stop them in their tracks with other methods. Sometimes they work, sometimes not, but I'll give anything a go when I'm feeling that bad.
1) Taking a brisk walk or jog around the block a few times. Getting the heart rate up can often relieve symptoms.
2) Splash some ice water on your face. This can trigger a vagal response and your heart rate may temporarily increase, but then may simmer down and regulate!
3) Try coughing very forcefully.
You feel them when you are resting simply because you are more aware of them and your heart slows down enough that you really feel (and possibly hear!) the thump that comes after a PVC. For the nights that it's really bad, maybe taking something like a Tylenol PM or some Benadryl or something with diphenhydramine (the active ingredient in those drugs) might help you fall asleep.