Hurt my voice

Went a little overboard singing at a concert the other day. I've blown out my voice at shows before, but this time feels different. In the past I've gotten hoarse and scratchy, but this time I can still talk and sing fine. It just feels like I swallowed a pill wrong, or like a shirt collar that's just a little too tight. Nothing to really make me panic, but just enough to wish I didn't feel it. It's been like this for 4 days so far. Any idea how long it'll last?