I'm not sure if I should be worried

I'm having extreme pain in my chest and upper back. It's a dull pain I can't really explain but it hurts. I haven't hurt myself recently. I have had a headache for about 2 weeks and have been recently coughing and throwing up. I had been drinking a drink, I didn't realize had a very large amount of sodium in and have switched away from it. It's been going on for weeks and just seems to be getting worse. I don't know if I should be worried or wait for it to figure out itself.