Theater actors talk about “Post Show Depression” or PSD. Several years ago at a Christmas party my wife and were hosting while visiting with a local community theatre actor I mentioned how I feel a bit blue after the Christmas season… she lit-up.
For the next 10 or 15 minutes we talked about PSD, she explained how common it is amongst theatre 
actors… I was relieved in a away, I had a “thing”, something with an actual name and something somewhat common amongst performers.
In recent years I haven’t experienced PSD at all. I think the primary reason is my awareness of it and that I have a “next thing” I move quickly into.
If you think you might get afflicted by a bit of PSD you might find this article helpful.
https://forgingfortitude.files.wordpress.com/2013/10/postperfdepbuckner.pdf
