It looks like you might have some IJV compression where you’ve put the arrow on the image, but @TML can give you more info about that…
There’s more detailed explanations about the classic symptoms & the vascular ones in the Newbies Guide section here:
ES Information: Common Symptoms And Possible Explanations For Them - Welcome / Newbies Guide to Eagle Syndrome - Living with Eagle
From your description of your symptoms, it sounds like you have symptoms of both, like quite a few of us have.
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