I am not feel well since last week, I had panic attack at night. Main reason for this anxiety attack is that have lots of thoughts in my mind about dying because of cancer. I was having little chest pain, so, I develop this thought a lot I guess. After that I feel very uncomfortable breathing. I am having chest pain. Fatigue all the time. Usually at evening and at night I feel uncomfortable. Also having back chest pain. I hope it is not cancer. :) because I have very bad habit of smoking, but I am trying very hard to quite it. I have been to hospital but they just said its because of the seasonal change and gave me medication. But I had never been in this condition before, even in seasonal change. So, please if you can tell me something that will make me feel better, I would be very thankful.