YOU SAID:

I was only a cicada for seventeen weeks cause then the aliens came and I died

INTO JAPANESE

私は17週間だけ蝉でしたが、その後エイリアンがやって来て死にました

BACK INTO ENGLISH

I was a cicada for only 17 weeks, after which an alien came and died

INTO JAPANESE

私はたった17週間蝉でしたが、その後エイリアンがやって来て死にました

BACK INTO ENGLISH

I was a cicada for only 17 weeks, after which an alien came and died