Be careful with the Motrin. Dr John Berardi writes:
"Yet new research suggests that NSAIDs, in some cases, might actually hinder injury healing in the mid-term. Celebrex, for example, reduced ligament strength in rats recovering from injury by about 32%. In another study, the same thing happened with both Celebrex and indocin. Not all studies show these effects, but enough of them do to cause some concern and to moderate our NSAID use in acute injury or muscle pain. Beyond interfering with ligament healing, NSAIDs also may interfere with the healing of muscle strains, adaptations to weight training, and bone healing in the mid-term. Of course, there are also the side effects (GI bleed, etc with non-selective NSAIDS). Yet again, the data are mixed."
And I'll give another vote for work on your abs. All my back pains went away when I started concentrating on abdominal work. Also, studies have shown that static stretching before exercise actually increases your chance of injury. Warm up dynamically.
Vitamins A & C help with collagen deposition and don't forget your aminos:
"...in one study, the combined administration of 14g arginine, 3g HMB, and 14g glutamine in two divided doses (two doses of 7g arginine, 1.5g HMB, 7g glutamine per day) for 14 days significantly increased collagen synthesis in adults."