It should fix itself quickly. If you do dumbbell bench presses, the difference between your right and left sides will be more readily apparent in that your left side will not press up as fast as the right. I had that problem a while ago, all I did was to keep to my routine, but use dumbbells instead of a barbell and concentrate on keeping the dumbbells even. While I may have held my right side back a bit, it did not take long at all for my left side to catch up. I wanna say that after 2 weeks, I didn't notice a difference anymore. You just need to condition your left arm to handle the stress that your right arm has been compensating for.