YOU SAID:

having lunch in my room

INTO JAPANESE

私の部屋で昼食をとっている

BACK INTO ENGLISH

I'm having lunch in my room.

INTO JAPANESE

私は部屋で昼食を食べています。

BACK INTO ENGLISH

I am having lunch in my room.

INTO JAPANESE

私は部屋で昼食を食べています。

BACK INTO ENGLISH

I am having lunch in my room.