I agree with all of the above... You should keep lifting, eating, studying, etc. You are to yourng. Your still growing naturaly. You could screw that up! However, I'm concerned that you might go out and do something that is ill advised anyway. If you are that type and insist on this course at least take this into consideration.

GROWTH DEFICIT:

The use of anabolic/androgenic steroids can stunt the growth potential of children and adolescents. It is interesting to note that often there is a short-term accelerated growth of the bones. With continued ingestion one must count on a premature closure of the epiphysial cartilage which leads to a growth stunt and ultimately results in a decrease in the normal predicted height. Further growth is impossible making this an irreversible side effect. Young athletes who, because of their extreme ambition have decided to take steroids should, for this reason, reconsider. The only steroid that does not cause this serious problem is Oxandrolone (see also Oxandrolone), so one hopes that its producer does not remove it from the market.