@Jordan - I’m glad Dr. Aghayev has answered you regarding the stylomandibular ligament. I think he would be a good surgeon to see as he would also take care of your IJV decompression which will help you A LOT!!
I just re-looked at your hyoid bone, & the greater horns, besides being very thick, look quite close to your spine. This could be in part because you’ve lost the natural lordotic curve in your cervical spine & now have “military neck”. That can be restored with gentle PT exercises, but it takes time & consistency.
Having the greater horns of your hyoid so close to your spine can cause hyoid bone syndrome (HBS) symptoms. It’s possible w/ cervical spine curve correction, the hyoid bone symptoms might slowly disappear without surgery.