when i was 14 i tried to lift 100 lbs with my back . i rounded my back when i leaned over and the weight rose an inch and then i heard a suction cup sound and it felt like my spine came apart, like a soup can lid in the open position i felt pain and it was hard to move. i told no one and every once in awhile i would get this pain in the same area and it would not go away. then i did deadlifts and it hurt in the same place after about an hour and i continued to lift for months not religiously but frequently, and the pain went away and has never come back.
You should probably go to see a chiro and let him know about it, and get some x-rays. Just to make sure there isn't some damage in there that you could possibly aggravate by lifting.
Stats: Age: 34 Weight: 205 Height: 5'6"
Gym PRs: Squat:635 Bench:560 Deadlift:495
Meet PRs: Squat:575 Bench:520 Deadlift:510 Total: 1605@220