Hi, my son is 19 and, been having chest pains for around 1yr. He experiences a stabbing sensation when breathing and walking, sweaty hands and feet, feeling cold and very tired and sleepy.He has had a number of ecg and chest X-ray, but all come back clear.We ve tried pain killers and indigestion remedies, but nothing helps. I m really worried something might be wrong. Please, what s your opinion. Thank you Jo.