Suggest Treatment For Sore Throat

I scratched my throat about 8 days ago, and I didn't really do anything to deal with it. I actually had a slight sore throat before I scratched it, which I thought might be caused by my asthma medication. Now it's 8 days later, and my throat has not stopped hurting. It hurts a lot worse now (pretty painful), and it feels very dry all the time. Will this go away on its own if I start gargling salt water or something, or do I need to see a doctor?