Flex dosage recommendations

I'm 29 years old. Back in March, I suffered a nasty injury. I just got my X-rays back, and the diagnosis is osteoarthritis—narrowed joint spaces, subchondral sclerosis, the whole works. Basically, it's post-traumatic arthritis resulting from that accident. From what I've read online, you can potentially mitigate this kind of damage if you act immediately. Unfortunately, I didn't—and now I'm trying to make up for lost time. My specialist appointment isn't until January of next year, so I'm stuck waiting.

I picked up some Osteo Flex... Each serving includes:

Glucosamine HCl 1500mg
Chondroitin/MSM complex 1250mg
Vitamin C 60mg
Manganese 2mg

There are a few other ingredients in there too.

The dosage seems geared toward an athlete looking to maintain healthy joints, but my goal is different—I want to hit this hard to help my cartilage regenerate and prevent further degradation. Is it actually safe to take higher doses? Honestly, I'm not overly worried about minor side effects like a bit of nausea or anything like that.

I've also started taking Omega-3s—just one serving a day.

Does anyone know of a specific supplement that packs vitamins A, C, D, E, plus calcium and copper? I'm looking for a comprehensive blend of everything that might help in a situation like mine.