Friend: I have been taking Metoprolol for 20+ years with none of the side effects you described.... at least that I allow my mind to focus upon. For what it is worth; give thanks in advance for eventual good outcome, be at peace, resolve to live as normal as you possibly can. Make sure you have a highly trained cardiologist and describe your feelings in a specific and organized way.
Believe your test results and measurements. More likely your symptoms are a function of your condition and not necessarily the med. Press on. There are alot of people on your side!