I Have Been Tested For A Heart Condition Given A

I have been tested for a heart condition given a stress test and was told that everything was good, but I'm still having shortness of breath and sweating that so bad that it run down my face like someone have poured water over my head. I have a thyroid condition that to low and the Doctors mediations does not help me at all. I have gained 60 pounds in the last four months. I have a pain in my right upper leg that the doctor told me that coming from a pinched nerve in my back because their is no clog in it. I don't know what else I can do please help me if you can. Should I get a new Doctor?, are do I just have to live with the conditions?