It was a year ago today, that I broke my Tib/Fib. Like you, I was jumping and lost control..lucky for me the broken leg was the only injury I sustained.
After the injury, everyone I talked to told me to sell my bike..but I decided that I must at least fix my bike and get back on it at least one more time before making the final decision. I started slow, riding on flat ground, back roads etc. It eased my mind, and now im back riding almost every weekend. Im not as aggresive as I was before the injury, but im riding and having just as much fun as ever.
Take it slow, like others posted..jumping isnt the only thing you have to do on an MX bike.