Well about 3 weeks ago I was messing around at home with medium heavy weights. I was doing deadlifts and i wasn't using proper form. This wasn't a deadlifting day or anything I was just screwing around in the garage. Well low and behold I pull my lower back to the left side. Before this I was a champ at back excersises. I could deadlift forever. So after I did this idiotic mistake I decided to have 1 week break from lifting all together and see how my back was. When i started again last week my back was a feeling alot better. I only daedlifted once that week and got to a pretty heavy set of 295x3 on my last one. When I did though my back was pretty soar afterwards. It was soar enough that I couldn't do barbell rows at all. Also when I squat I could feel it in my back and at the heavier weights it was really bothering me. So now this week today I tried deadlifting and I only got to set 2 of a 5x5. It was like 1 45 and 1 40 on each side and Im on my 3rd rep and I feel it again. I didn't pull my back I just felt it and stopped before I pulled it again. If im feeling good I'll still do powercleans on Wed. since they don't stress my back that bad. But right now I would like to know your opinion on what I should do. I know that from now on if i deadlift i will use one of those belts. But how long do you guys think I should wait until I try to deadlift again? Any other advice would be helpful as well.