I encourage you to get a second opinion, if you have any doubts or concerns.
Here are my concerns. First, you don't have to have papilledema to have IIH. IIH affects everyone differently. Second, there is a scale for normal pressure, but we've also found that it varies depending on the individual (and also throughout your life) so more of a guide than diagnostic tool. For instance, when I was initially diagnosed my opening pressure was only 20, but there were also times that my shunt was set at 20 because my symptoms were better at that level. They usually confirm IIH if your symptoms improve following an LP because they drain CFS and lower the pressure.
There is a possibility that you had a "migraine" following the spinal tap because you were suffering from low pressure after CFS was drained. Did you find that you felt better laying down and worse when you got up? Did they suggest laying flat, caffeine, or anything to treat the migraine?
Unfortunately, many members have been misdiagnosed. At one point I was told that it was a side effect from the bird flu..that was also an IIH Specialist. I was even treated for migraines, chronic headaches, etc following my IIH diagnosis because the specialists believed test results over my symptoms. Eventually, I found a surgeon that told me those tests were no longer relevant and he fixed it..they were also all IIH Specialists. IIH is a rare disease and there isn't a lot of information out there, so many times we become our own advocates and end up educating the "specialists" providing our care.
I'd encourage you to review our informational booklet "Just diagnosed-What is IIH?" and other info in our Useful Booklets and Guides section (http://www.ihaveiih.com/f44-useful-guides-and-printouts). If you still feel that you have IIH, get that second opinion. If not, press them to find the cause of your symptoms.
Let us know if you have any further questions or concerns, and please keep us posted!
Take care,
Julie