What Causes Hot Flushes, Cramps, Migraines With Dizziness?

Hello, for about a month I've been having hot flashes, cramps(kinda like menstrual) and a couple weeks ago I've started having slight migraines,and the past few days I've started feeling dizzy. I'm not sure as to what could be going on exactly. Right now I'm guessing it's a new form of birth control I'm trying.