Gig drop

As Spytfyre grows as a band and as a live show,  I have discovered something I can only refer to as gig drop.

I don't know if this is a widely know phenomenon but it feels very real.
I have experienced noise fatigue many times after playing and going to live shows,  this is where you get a kinda of hangover feeling after being subjected to loud music from the previous night. (without the alcohol)

But this gig drop I have been getting after a gig is something a bit different. 

The following day after a show,  I have found myself to sink into a temporary kind of depression.
it seems to last about a day,  the same as noise fatigue and makes me want to just hang out.  Not being bother to do anything and I find it hard to get into anything.

Playing PC games,  playing guitar,  writing,  visiting.  I just can't be bothered to do stuff.

I put this down to the high from the gig the night before. As we play to bigger and bigger audiences, 

 the gig drop gets worse.

I suppose this is just another undocumented thing about live performances.

Anyone else get this after playing a show?
Is this a known thing?