I don't know how accurate that calculator is. I think if you were 22% it'd be pretty obvious, that is pretty high. For me to be 22% I'd have to gain almost 12 kilos. Or lose a bunch of muscle and gain quite a bit of fat weight. You said you've only gone up ~5 kilo's since your injury and I doubt you lost that much lean muscle mass and gained that much more fat in the few months cine your injury.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."