Hi there ~
It is understandable to be frustrated when one is one feeling well despite seeing many doctors. I think that you will find answers by seeing a good psychiatrist
if you have not visited with one yet. Depression
and somatoform disorders can be disturbing and can mimic anxiety
which can all be comorbid. I advice you to go to a psychiatrist to have yourself checked out.
I hope this helps. Take care and have a good day ! There are many medications for the range of symptoms you mention, so take heart and take my good advise.