Lost voice at party weeks ago, still painful to speak

[EricClapson]

I lost my voice about two weeks ago from yelling far too much at a party. Since then, I've been able to speak, but I get pain in the left side of my throat and my ear when I talk for more than a minute. In general, I feel discomfort/a small lump in my throat when I swallow which is really what hurts. My voice sounds totally normal, though. A doctor gave me a 3 day course of prednisone which helped a lot (I was able to talk with no pain; I thought that I'd healed completely) but since then I've gone back to being in pain when I talk for too long.

Is this simply Laryngitis that's taking longer to heal than usual? How much longer can I expect this to go on? If I talk too much, could I hurt my voice further?