question: Hello, I'm a 31 year old male. Last week I had a full blood panel work done and everything came back better than normal. Tonight I think I may have had a minor heart attack. My back locked up, I couldn't breathe and I was sweating hard for about 10-15 minutes. I took tylonol for the sweats and advil for the back. I still have some discomfort in my chest when i can breathe deep, but the pain is gone now. All this back pain seemed to start on my left shoulder and worked its way down to my lower back and into my chest. What's happening to me?