I have angst because I suffer from migraines: headaches that are extremely painful. I only know that they are migraines because I went to the doctor long ago and he told that's what they were.
No amount of pain medicine has halped me, and they are getting progressivley worse: it used to be that when I got a migraine, all I had to do was take a shower and go lie down, sleeping for 12 hours or more, but within the last year and a half to two years, not only do I get migraines, I also throw up.
It started out just a migraine and being sick once, but the last migraine I had, I was sick 3 times. It doesn't seem to matter whether I eat the night before I think I'm going to get a migraine, or whether or not I take medicine, nothing seems to stop the migraine and the sickness from coming.
Thankfully, it only lasts one day and only seems to happen whenever the weather is about to turn bad. My mom used to call me her little barometer, because I would be sick, and then several days later, there would be a bad thunderstorm, so she knew to get ready for it.
I've often compared myself to Psyduck (the migraine Pokemon) and Harry Potter (he got sick when sharing visions with Voldemort), because the migraines make me feel like that.