LCL injury?

Patient: Ok, so i was hit on the outside of my right knee 5 days ago, and since then i have iced three times a day and been taking NSAIDS anyways, the pain seems to be moving under my patella and through my calf, but mainly focused on my LCL, there is red and blue bruising, and i cannot fully straighten the knee, nor bend it all the way without using my hand to pull it back, also it has felt somewhat unstable. What is your professional opinion to these symptoms? FYI i play Lacrosse and am a 16 year old Male