Ok, this isn't me asking for a diagnosis, I'm not that dumb, I'm asking what I should do. I just started working out like 20 minutes ago. I warmed up on the elliptical for 2 minutes, stretched, then did some warm-up squats. My first exercise would be squats so I did alot of leg warm ups. I did 25, then 50, then 75. Don't laugh but I was doing 115lbs for 5x5. I felt fine my first set, on the second I felt my knee a little bit, not much pain but I knew something was there. I go to lift it for my 3rd set and my knee hurts, not crazy bad or anything, but I definitely know it's there. My dad had Osgood Slaughter's disease or whatever that is, so I'm not sure if I have genetically bad knees. I'm 99% positive I'm doing squats with good form, I wasn't always though (I found out about 2-3 weeks ago.) if anyone can relate some advice or anything please do, I'm gonna go try again with some light weight.