How you talk reminds me of my English teacher. He's awesome and acts kind of like you. Speaking of vomit inducing pain: Avoid things that could provoke the development of Kidney stones... The pain can make you vomit. It's not personal experience but my older brother has experienced it. Now I'm scared.
When it seemed like I was going to throw up and I asked my wife for a bowl, kidney stones is what she thought also. But I wasn't able to talk enough to explain what was happening. Sounds like no fun at all.
Pretty sure it was what I've always heard called a "back spasm". I pinched something and then my bodies response was to clench up those back muscles. Which caused even more pain of a different variety. As soon as it tried to let up a little bit the pain changed back and so it clenched up again. Meanwhile my guys are trembling along with it threatening to make me lost by breakfast. Time with the heavy-duty massager finally got it to ease up enough so I could sleep for a bit.
I have felt worse pain in my life but not for as long as this in one stretch. I recommend avoiding if possible.