120lbs in 4 months is about 1/3rd the speed you'll need to lose weight at if you want to lose 22lb in a week. 120lbs in 4 months is about 7lb a week, which is fast, but not extraordinary. I've lost that fast myself so i've no reason to doubt you.
I know i'm right because math and common sense. If your metabolism was so quick, how did you put on 22lb in the first place ? two possible answers: 1) you didn't 2) your metabolism is normal
You may or may not have a fast metabolism, but not to the extent you are the only person in the world capable of doing it. Because I can't find a single other person on the internet that has done so. Your story also makes no sense. Your metabolism is really fast, yet you managed to put on 22lb really quickly and also used to weight 280lb. Doesn't add up mi amigo