I would also have to say that this sounds like your suffering from anxiety and or depression. What your symptoms were described as above were very similar to having an anxiety attack. I would talk to your family doctor and explain the problems that you have been experiencing. He will more than likely start you off on a medication that could help. Don't be discouraged if it takes some time to find the right medication for you or time for it to work. Hey, maybe you might not even need medication, just someone to talk too. Good luck, take care.
Assuming your doctors ran tests and gave you a good physical exam I would say that your symptoms are typical of anxiety and/or depression.
I would urge you to find a good psychiatrist who can help you get on the path to finding what is causing these symptoms quickly.