I forgot u bro, sorry
it can mess up ur endocrine system, cause ur endocrine system is developing in ur age. if u r using steroids now, u might end up with a permanent damage, cause the body notices that there is enough exogenous hormone in ur body and lowers endogenous production - permanently.
another point is that ur brain is still growing and developing and hormones control these processes. if u add exogenous hormones u might tend to aggressiviness, weariness,anti-social beheaviour, depressions etc. pp.
I would wait.