Hand injured?

I punched a wall about a month ago, and it still really hurts. I had an x ray, but it showed no break, but the pain and swelling is still there. It's the middle knuckle on my right hand, and most of the pain comes from the left side of it. I can also feel something moving when I push it, and it makes a creaking sound. Also, pain is usually worsened by bending and then straightening my hand. Any comments will be appreciated. Thank you :)