Hi there, I'm relatively new to this stuff. But my friend got me on Test-Prop about 2 days ago. Some people say its a bulking agent and some say its used for cutting. He says it's going to get me big. right now I'm about 5'9" 155. My question is will this stuff make me get big? All ive been taking in is protein and ive been lifting hard. I don't know a whole lot about it and why is my right ass cheek so sore. will it be like that after every shot?