Welcome to Connect @mkbc. No, you are not going crazy, don't believe that for a minute. I definitely understand why you feel that way though and have been through my own journey where I felt that way too and it sucks.

It's not easy to feel odd sensations and disruptive symptoms that have no clear medical diagnosis. Sounds like you've been doing your due diligence, as have your doctors with ruling things out.

Here is a link to a video from Mayo's Dr. Sletten who lectures on Central Sensitization Syndrome (CSS). I'm no doctor, but your summary sounds like you line up with CSS. Have a watch and see what you think -

Dr. Christopher Sletten - Central Sensitization Syndrome:

How have you been handling your symptoms? Have they disrupted your quality of life?