Same here on all counts. Mine tended to happen in clusters, with weeks or months with none before the first in what's usually a series. Based on some research

Same here on all counts. Mine tended to happen in clusters, with weeks or months with none before the first in what's usually a series. Based on some research, hunches, and a sense of harmlessness, I started taking magnesium when I notice a first one and rarely (never?) have another anytime soon thereafter.