@mountangurl Regarding Orthostatic (better flat) Headaches/Pressures: I’ve already been the spinal CSF leak route with no leaks found on MRIs, CTM and DSMs at Cedars-Sinai. During that time, @Isaiah_40_31 helped me discover my bilateral, elongated styloids/IJV compressions on imaging. I had my right side surgery with Dr. Hepworth in December. Still symptomatic, he is doing my left side next week. One thing that gave me much hope regarding the better flat HAs is this paper by Dr. Fargen. If my upright HAs don’t resolve after surgery 2, then further options for me are to look into CCI and possibly go to Dr. Callen for another spinal CSF leak workup (since they are so hard to find, as you probably know). Anyway, check out this paper, as it explains how IJV compression can actually cause better-flat HAs. Best wishes and prayers to you! 
If that link doesn’t work, try this one: https://canada1.discourse-cdn.com/flex027/uploads/ben_eagle/original/2X/b/b273438078a4c4b4c8254b88750bf552f62aa7b1.pdf