Should i see a doctor?

Last wednesday i my kneecap popped out of place. it didnt dislocate and go all the way to the side. the school trainer said it slipped off its track and was on top one of the 2 bones it sits in between. i rested and iced and tried to wreslte on it today and it did the same thing. only this time the pain was a little more towards the fron of my knee instead of the inside. so should i see a doctor. cause i dont wanna tear anything like acl or mcl or miniskus or whatever those are. cause my sis had knee surgerey and now she cant run anymore?