While I was working (30 years in a job that I loathed, but was unable to quit due to family pressure and financial issues), I used to get killer headaches. I remember thinking that some sadistic monster had my head in a vise, and cranked it tight, just stopping before my skull imploded. Hideous pain. I also had nausea and vomiting, which made the pain even more excruciating. I would have to go to the ER to get an injection of some kind of narcotic and Phenergan for the vomiting.
However, I retired 16+ years ago, and have not had a single "migraine." I knew I hated the job, but could those horrible headaches have been like a toxic reaction? I certainly don't miss them.