3 month old ankle sprain. pops when i tilt it and hurts after long standing or walking. what could this be? should i have it checked again?

Get checked: Could be instability, loose bodies or inflammation. If not better by 3 months its time to get checked.

See doctor: Yes, have it checked again at 3 months it should be healed.

Yes: Any injury that continues to be painful or exhibit other symptoms after more than a few days should be professionally evaluated. A "sprain" is actually a tear of the ankle ligaments and can be accompanied by a bone or cartilage injury as well. See a podiatrist for an evaluation and x-rays. Injuries left untreated can result in permanent pain and joint dysfunction.