With your visual challenges & vertigo, it does seem like you might have IJV compression which you will need further testing to determine. The angiogram is obviously not helpful for that. There have been a lot of discussions on our forum about vascular ES over the last several months & also some new links to research papers on that topic (the Research Papers link is in the General category on the home page.
I don’t know if you’ve read these two posts which Jules wrote, but if not, they contain good information that will be helpful for you: