Sorry to hear about your injuries bro. In January '98 I got stuck toeside on in a GS course and got a tree. I ended up with a shattered right pelvis that luckily didn't affect the socket, all above it, kidney in 3 pieces, lacerated liver, 2 broken ribs and a broken back. No surgery luckily, doc said "lay there, you will heal". My recommendation is to do everything that your doc, and PT say to do and don't try to make an early comeback. That is just an extended period of recuperation waiting to happen. I was back riding the next season but my mind never came back to attacking a course like I needed to.
Heal well and you will ride again.
Ink
I had a friend who broke his pelvis similar to yours and he is back riding also but he was only 19 when his happened.
Keep us informed of your progress.