This is where pseudoscience comes from. You dropped acid and think it helped you but you probably tried many different things before acid which "didn't work". In all likelihood the acid had nothing to do with it; it was just a coincidence that your symptoms improved.

Also, it's common to have a lot of migraines for a period in your life and then stop having them. Or sometimes the reverse. I used to get very painful migraines about twice a year. Eventually that stopped. I still get migraines a couple times a year but they're quick "silent migraines" i.e. not painful, just annoying and disorienting.