How to say “You've already ordered, right? I'll get something for myself.” in Japanese

In Japanese

もう注文(ちゅうもん)したんだよね？じゃあ、私(わたし)の分(ぶん)だけ頼(たの)んでくるね。

Mō chūmon shita n da yo ne? Jā, watashi no bun dake tanonde kuru ne.