Optimal nap time is apparently 20 minutes, with 7 minutes average to fall asleep. I give myself half an hour then grab a coffee if still needed

There seem to be two kinds of people in this world.....the ones that can close their eyes and catch a nap for 20 minutes - an hour - whatever - and pop up feeling refreshed and energized. And the other ones who feel like they've been hit by a bus if they get anything less than a full night's sleep. And - perversely - the two types tend to migrate towards each other. hahahaha I seem to be able to "zone out" (not fully asleep) for a brief period of time and then get up and push on. Hubby's idea of a "short nap" is a minimum of two hours. Gotta figure out what works best for you....trial and error kind of thing.

I am not the right person to give u a solid advice ( for the future , since your fate was already decided for today ) but I ll tell u what I do .
My working days are 19 hrs long awake . Some times , most of times , 5 such days on the row .
Two hrs is better than none , I ll take it .
Some x if load permitted , I take 15 mnt nap in my chair at work . Whatever , I LL TAKE IT .
Next x take the 0500 nap and don’t worry , u will hear the alarm . And coffee when awake anyways , what’s the difference ?

No. If you have a 2 hour sleep now, you'll wake up worse than if you hadn't slept at all. Set an alarm and just have a couple of 15 min sleeps waking up properly in between. That way you'll feel rested but won't have reached stage 4 sleep, from which you'd wake up feeling like crap.