Don't push yourself too hard, and don't lose yourself.
don't push yourself 你别逞能 (量力而为)
don't force yourself (to..) 别逼自己
don't give yourself too much pressure 别给你自己太大压力
don't lose yourself (in....)别迷失自我
Do not forcing oneself too tight, do not lose oneself.
don't lost yourself!
Don't force and lost yourself!