I have chronic, daily migraines. I have a vp shunt for severe hydro placed 4 years ago and I've had a headache ever since. My headaches are debilitating. They wake me up at night, and I have them off and on all day. I finally got botox for migraines. My headaches got much worse at first (for about 3 weeks) but then I got a little relief, still having headaches everyday. It's time for me to get botox again, but I'm so nervous that my headaches will get worse at first. Has anyone had any experience like this? Please help!