What can I do about the pain in my right ankle?

This was probably a moderate to severe sprain/strain. I don't know how much your rolled or which way it rolled but based on the location of the pain is probably a strain of one or more of your flexor tendons and probably a ligament sprain on the medial aspect of your ankle. There's also always a chance of fracture of a metatarsal or navicular bone. My advice would be to find someone (chiropractor, physical therapist) in your area that does Graston or Active Release Technique. These are soft tissue techniques that help break up scar tissue and adhesions that form after an injury to muscle, tendon or ligament. They will be able to do x-rays if need be following an exam. Also, make sure they do some sort of rehab because you will probably need some wobble board and other strengthening work to help the ankle return to its former glory.