What should i do about my knee's?

should I do some stuff about my knee which i have dislocated a couple of timesi dislocated it once about 2 years ago playing footy, i twisted on the spot 2 go after a bouncing ball and it popped out and i collapsed, left knee, popped out 2 the left, pretty far, i was left with it out for about an hour ( which i heard is stupid, it should have been put back in asap, is that true?) till i got 2 the hospital, when the brace was taken of... it had moves back a bit, and the doctor moves it a bit and it went back in... i got an xray, no problems i guess, was put on crutches and a brace and told 2 keep of it and dont bend it, didnt really use them, started walking and that after a few days it healed after a few weeks and i could run again ( i was given excercies aswell i done them for a few weeks) anyway it was all good it seemed for serveral months, then it kinda dislocated again a bit, same way, but went back in straight away, and it mite of dislocated again the same way on 1 more ocion anyway i havent had any problems with it for a while it just cracks alot when im lying or sitting and i fully extend it lock it, then unlock it, ive been squatting at the gym for a few months with no problems, (maybe it strengthened it?) but yeah anyway right now im wondering if i need surgery? also my right knee, the other one, ive never dislocated, but it cracks aswell, the same as the left, and sometimes when walking up stairs etc or jumping up them, i get a sharp painful ummmm pain, deep in that knee... anyway so yeah i think my knees are pretty screwed, wondering what i should do.... also when i was alot younger many years ago.... the knee ive dislocated had a swollen kind of bump bellow the kneecap on the bone i guess,,,, i was told its nothing... growing thing, its still there if i remember it was kind of painful at the time,, and i had knocked it and that why i was worrying its not painful anymore... ive knocked my knees around a bit as a kid, and they have cracked alot for ages and have had alot of little things like that... im a 19 year old male thinking of playing footy and im worried.... THANK U SO MUCH FOR READING ANY HELP IS APPRECIATED :D