I used to get Migraines (years ago when I was on the pill).. and I got aseptic mengingitis (three times total.. one time badly and confirmed by LP)..
The 1st time I got IVIG I got aseptic meningitis (due to the rate going to fast).. I had a HORRID headache and my entire spine hurt, and I got a fever and awful body aches.. If i just walked across the room my entire spine hurt all the way up, couldn't turn my head due to the neck stiffness and pain and a THROBBING nauseating headache.... I also got a rash too..
Now that I have gotten used to all this IVIG stuff, as long as we control the rate I have no problems!
Good luck! Hope that it works great for you!!!