I dont get whats so funny ?? He's 15, and doesn't know shit about gear...seems to me like he's in the right place. At least he's asking...
Definitely stay away from the gear TBB, or you'll regret it down the road. Your lifts are impressive, especially that squat. Keep up with the six meals a day, and throw in a few protien shakes between meals. At your age food is all you need.
PS your doctor is an idiot, prednisone as no anabolic properties, but it's very possible that it is catabolic.