Hey Jenny-- missed seeing you around these parts! That lil puppy is a real cutie. Now, follow Dr.'s orders and get yourself over to Dirtweek! Maybe the jumping and racing is out for now, but there's a whole world of riding (like, trials) that can keep you limber and teach you some new tricks. With your ability on a unicycle, I bet you'd pick up trials in a heartbeat. Then, when you hit the MX track again, (and I just KNOW you will), you'll be ahead of the game.
Stay strong, and keep plugging away. Things WILL get better.