A little over a month ago I experienced chest pain in the back of the chest and It made it hard to breathe. This pain went on for only one day. I am only 22 so I dismissed it and tried to fall asleep but I was unable to and went to the ER as my chest pain and tightness began to worsen. They did an EKG, complete blood count and chest X-rays and concluded everything looked normal and that I had a panic attack. The pain was unbearable and I felt a warm liquid sensation spread throughout my chest and feeling like I was going to pass out along with chest tightness and left shoulder pain. I was so scared and had never experienced any of this before. I just can't help but think that there is something more serious going on as I was completely normal before all of his happened? I was referred to a psychiatrist and am taking Prozac to help with my anxiety and panic attacks as I have had more than this one episode. The next episode I felt a burst of pain in my left shoulder and I started hyperventilating but didn't have much pain trying to breathe. I am just wondering if this sounds like a normal panic disorder or if it could be something more serious that I should have checked for.