About 4-5 days now, I have pain in the middle of my chest, it hurts when I breathe, sometimes it's sharp, the pain lasts 2-3 hours. I want to ask, what should I go for if I have pain in the middle of the chest?

This year I am 22 years old, I have pain in my left chest, sometimes it hurts, sometimes it hurts like a knife, sometimes it hurts like someone squeezes inside. Chest is always heavy with occasional difficulty breathing. I went to the hospital, they had an electrocardiogram and an X-ray, the results were normal. So the doctor let me ask the left chest pain, chest heaviness with shortness of breath, what are the signs of the disease? I thank you doctor.

I have a dull pain in my left chest since 1pm until now. When lying on the left side, the pain is sharp, lying down is also painful and difficult to breathe. So the doctor asked me if the dull pain in the left chest with shortness of breath is a sign of the disease? I thank you doctor.

Tell me, these days I keep having chest pain in the middle but there is no nausea or shortness of breath at all, like muscle pain, I feel it pain in the left arm, the doctor told me Symptoms of middle chest pain spreading to the left arm indicate what disease? Thank you doctor!