Im only 14 but I know a lot on this subject! If ur anckle hurts on the like top side of the bone that is stickin out it might be ur ligaments! U could have torn them or maybe just streched them. I have no ligaments left in my anckle b.C of a bball injury, but theres hope I still am able to play ball, run, jump, ect. The only thing I cant do very well is swim b.C kicking the water hurts it really bad. U might wanna go to the doctor pretty soon to get it checked out (trust me) theres is nothing they really can do for it other then some major physical therapy 3 or so times a week. (had it maybe 4 times now for different injuries) or u could try some of these exercizes.......
Towel strech- u take a towel and pull it towards u and push against it 10 times holding it to the count of 10 then releasing with resistance and then take and pull it off to the right side and do the same except u might need someone to pull the towel to the left and u push with ur anckle then have the person go around the other side and pull to the left and u push again after that have the person pull down on the towel infront of u and u pull up again do these each 10 times to the count of 10!
Balancing- u stand on the anckle that is giving u problems and pull ur other foot up to about ur knee and u may use ur arms to balance but preferd not to.... Then after u get better close ur eyes and do it u may feel like ur goin to fall over but if u make it to the count of 30 second (kept by a friend or sibling) ur doin good!
frog jump- u start standing normal and then jump up with ur hands in the air and come all the way touching ur hands to the floor then up and so on repeat 10 times in a row and increase as needed or decrease (u may feel kindof silly doin them but it should help after awhile also may hurt the first couple days)
balancing #2- stand on the anckle that bothers u and throw a weight ball back and forth to another person the person should throw the ball high low middle right side and left side to make u work! (10 times)
balancing #3- if u have an exersice trampoline make sure it is on a flat surface and balance on the hurting anckle for 10 seconds then increase to 20, 30 ect till u can do it for a min then start over with 10 and work ur way up to a min with ur eyes closed!
If there is pain then try doing less or less force but if it is still hurting doin just one then see a sports doctor please!!!!
Hope these work if u need more ideas on some exersizes then just write a reply and ill try to check every so often to see how ur comming! U may not trust me b/c im only 14 but like I said ive had to do all these atleast 4 different times at physical therapy in my life!!!!! I hope u believe me and try some it could make a difference!! :d