When it comes to pain, I'm a Class A wimp.
Even a steady, moderate-level headache mixed with a little nausea makes me all whiny. I've been sluggish for two days, and you'd think I had some chronic illness from the way I'm sleeping and complaining.
It's just altitude sickness. Happens to lots of people when they come to La Paz, Bolivia. It's happened to me before once, in Cuzco more than a decade ago.
I'll just leave it alone. It'll go away eventually.