Why do i have high ankle pain?

Yesterday I did my average 20 minute run on the treadmill, and some interval training (sprinting, running, jogging,lunges) on the track. None of this is new to me but, this morning I woke up with pain right above my outside ankle bone on my right leg. It made it extremely difficult to walk. There is no swelling, and the pain is a severe ache. Could it just be bad shin splints?