Injured Ankle Question...?

I too quite the tumble last night and hit my ankle really hard and it REALLY hurts and is a little swollen. I don't know whether or not I have to go to the doctor though because I was able to walk on it fine all day today and it was a sore kind of pain instead of the stabbing pain that it is now. do I need to make an appointment with my doctor or should I just keep resting and icing it? Thanks.