I'm having some trouble with a bad cough since yesterday, and now I'm experiencing more chest pain. Today, it's even getting hard to breathe, and there's a wheezing sound when I breathe. My sputum has turned yellowish-green, and I'm breathing rapidly. It's really uncomfortable, and I've never had any history of asthma before. Could this be asthma or just an allergic reaction? What should I do? Please help me figure this out.