I know this is against the rules for PCS (overload of caffeine and sugar) but when mine is at it's worst a Caramel Frappe from McDonald's works.

I generally try ibuprofen and relaxing first. Then I use muscle relaxer. It slows me down just a notch and that allows the headache to let up enough so I'm functional.

P.S. Even if they are technically migraines they are of the PCS type and may require different treatment than typical migraines. People without PCS can not understand a PCS headache.