Truly sorry about the headaches
...i understand how painful headaches can be.
All the symptoms you mentioned are almost in keeping with IIH. The relieve of symptoms after LP,the presence of papilledema
is suggestive of IIH.This condition is also commoner in females who are obese
. I agree with the diagnosis of the other doctors but lets wait for the MRI
that should show if there is any other thing that is causing the increased intracranial pressure.
Thank You.Wishing you good health