YOU SAID:

I'll be in my bedroom, making no noise and pretending that I don't existed

INTO JAPANESE

私は寝室にいて、音を立てず、私が存在しないふりをします

BACK INTO ENGLISH

I'm in the bedroom, don't make noise, pretend I don't exist

INTO JAPANESE

私は寝室にいます、音を立てないでください、私が存在しないふりをしてください

BACK INTO ENGLISH

I'm in the bedroom, don't make a noise, pretend I don't exist

INTO JAPANESE

私は寝室にいます、音を立てないでください、私が存在しないふりをしてください

BACK INTO ENGLISH

I'm in the bedroom, don't make a noise, pretend I don't exist