@EagleinSEA - I agree that your symptoms could point to IJV compression (which is obvious on your left IJV) & ICA/ECA compressions. I can’t remember if I sent you the link to our common symptoms & possible causes post which @Jules wrote, but it’s very helpful so here it is -
Thank you for the additional images. What I noted in the posterior image is that your C1 vertebra is shifted to the left & a bit downward which may be the result of your neck injury 10 years ago. That has pushed the left transverse process of C1 into your left IJV. I can’t tell whether C1 or the styloid is the greater compressor, but because of that situation, it would be wise for you to see one of the vascular doctors on our Doctors List. You had mentioned Dr. Damrose or Dr. Hepworth, & either would be fine. Dr. Damrose seems to be a bit more picky about whom he takes on as a patient, but it would still be worthwhile getting his opinion.
I’m really glad you found this community, & we’ll be happy to support you however you need us going forward. 