What was your regime? How many sets and reps did you do? The thing with squats as Im sure you know is the form. It is one of the most difficult compound movements to do correctly but also the most important one....my gym does not have a squat rack which is annoying but if you put some sort of support just above your uncle when you go down you could lean on it for a bit while moving up again...it's preferable to do it without but it helps in the beginning.
My technique is great. I lifted with the American football players at my school when I was in high school running track. So it's built over a long period of time, I don't even need a belt or a bitch pad anymore.
Basically I warm up with 135lbs and do that 16 times. Then I go to either 180 or 225. I usually do 6 sets of 8-10 reps depending on how I'm feeling. I don't usually do any more than that (weight) because I'm not trying to build mass and I don't use a spotter. I use a regular bench w/ rack and none of that box squat b/s.
In my day when I was 16-18 I squatted about 400lbs on my max (3 reps with spotter). I got crazy last year and threw up 300 for fun.
I also do pull ups and push ups, but I suck at pull ups.