The styloid processes can irritate the vagus nerve- we’ve seen quite a few members who have had difficulties like heart arrhythmias, the vagus nerve can cause that. Here’s a link to a mention in another discussions;
And quite a few members have had issues with their SCM muscle, here’s a link to one discussion:
It might be worth trying to sleep semi-upright if you don’t already, it could take the pressure off the nerves enough to help/
There’s lots of info about vascular ES in the Newbies Guide section if you think that you have this- I used to get the heart beat feeling in my neck, I had jugular compression. You might find that there’s other vascular symptoms which you have & didn’t realise.
We do suggest that if you can to take copies of research papers which support your symptoms with you to appts & sometimes the doctors will listen. Have you looked at the doctors list in the Doctors Info section to see if there’s anyone with more experience you could be referred to, or any new doctors on the list?