About ten years ago I took a bad fall in the course and thought I sprained my ankle as I could sorta, kinda walk on it. Went out of town for work and walked/limped on it for a week before seeing a doctor. And it was broken. Actually, the 5th metatarsal but since I walked on it all week, the crack only worsened. My stupidity resulted in a full leg cast for 14 weeks.
Took another bad fall just three weeks ago with a very sore ankle and this time, went to the doctor that day and luckily it was only a deltoid ligament tear, which she said would heal in 2-3 weeks with a brace and daily P.T.
Look up Alphabets for ankle sprains. With those, I started skiing last week.
But most importantly, get it properly diagnosed foremost.