[I can feel my heartbeat pulsating in my head]
I had that when my neck muscles were in severe spasms.
Might be too much weight lifting /weight too heavy and too many reps, computer/phone use, reading or desk work??

can tight neck muscles cause pulsatile tinnitus - Google Search


Also trigger points can cause many of your other symptoms..many areas are able to be self treated with hands or other available options in your home..certain areas near artery/veins should be left to pros..
More info...
Head and Neck | The Trigger Point & Referred Pain Guide
Pain Reference Chart

Soft tissue injuries can be tricky since it doesn't show on imaging..

A good PT or DC should be able to evaluate if neck /muscles might be the problem..