This is what happens when you're broke for so long. Actually spending any money on yourself becomes a crisis situation. Even if you can afford it. Even if it's a single hundred of dollars.
Got up this morning and cancelled it. Having a single shiny bauble should not bring the world down on my head, but here we are.
Update
I have started to de-tension a little before work and now my entire body is sore from being wound up too tight while not sleeping.
Great.
Definitely normal biological entity behavior. Certainly nothing bad could come of living under so much stress it causes muscle and joint fatigue. Everyone should have three to six sleepless nights a week and then crash for their entire day off. These are optimal operating conditions.