What Causes Burning Sensation In Chest, Throat And Back?

I get sudden intense burning in my chest area and my throat and back. These can last one hour or several hours. My doctor did an EKG and said there were no signs of a heart attack or damage. He also had me do an upper GI and ruled out GERT or acid reflux. Is it possible this could be a result of mold?: I also started suffering from memory loss and depression in the last few years, also my blood pressure has been rising. I am 48 yrs. old. I take 60mgs. of prozac daily.