I dislocated my elbow in 2008 and it completely sucked. I was off the bike for a long time, but it also happened in November, and I had some pretty bad calcification on my ligaments, so that didn't help matters.

The thing that was hardest for me in getting back on the bike was that my range of motion was so limited, I couldn't properly reach the bars. Even on the trainer, I was relying so heavily on my left (uninjured) side that even a short ride would cause me lots of pain in my neck, shoulder, arm, side, etc. I used it as an excuse to take up running and swimming (the latter really helped with regaining strength and range of motion, btw).

Your PT will give you plenty of exercises to do at home, and my advice would be to do them religiously. You will probably need to do them many many times a day, and they will be painful, but it's totally worth it. Also, try to see a sports-specific PT if you can--they will focus on getting you back to where you were before rather than just making it good enough.

I would also say to just take it easy for a bit and give your body some time to heal. I know how frustrating it is, but it's a pretty tough injury (my doctor said I would have been better off just breaking a bone), so don't feel like you have to rush it. I remember being exhausted all the time and sleeping a ton for like six weeks, and I'm generally pretty tough and pain-resistant.

It does get a little better every day, although my elbow is still messed up and it hurts when I try to extend it fully (I still can't). I think mine was particularly bad though, so you might fare better. Good luck!