I Jammed My Ring Finger About 3 Months Ago. I

I jammed my ring finger about 3 months ago. I did nothing to treat it. It still hurts, so, I put a splint on it 2 days ago. Today I took it off just to see how it was doing. it's still tender and my range of motion is much worse. ( I can't bend it very far, it wants to stay straight.)

What would you suggest, Should I Keep it in a splint? Any other advice?