I have neen having pain in my chest (pressure) for 9 months now.  I have also had severe dizziness and back pain.  I have seen the doctor on many occasions and they do not seem to have an answer.  I went to the ER and had a chest x ray done, then my doctor ran several blood tests and I recently had a abdominal ultrasound done.  Everything has come back normal.  The symptoms come and go, but they are really scary and hard to just deal with.  I seem to get these symptoms more commonly when I am relaxing.  They do however occasionally happen on random occasions when I am not resting.  I sometimes feel like my heart is going to pop out of my chest and I have a lot of issues sleeping because of it.  But once again, I had tests ran on my heart and those came back normal.  Lately I have also developed a cough that only seems to occur during one of these episodes.  Does anyone know what I could possibly be suffering from?