YOU SAID:

I’m heading to my room and heading back from my room right after I got to my car

INTO JAPANESE

私は自分の部屋に向かい、車に着いた直後に自分の部屋から戻ってきます

BACK INTO ENGLISH

I headed to my room and came back from my room right after I got into the car

INTO JAPANESE

私は自分の部屋に向かい、車に入った直後に部屋から戻ってきました

BACK INTO ENGLISH

I headed to my room and came back from the room right after entering the car

INTO JAPANESE

私は自分の部屋に向かい、車に入ってすぐに部屋から戻ってきました

BACK INTO ENGLISH

I headed to my room and came back from the room as soon as I entered the car

INTO JAPANESE

私は自分の部屋に向かい、車に入るとすぐに部屋から戻ってきました

BACK INTO ENGLISH

I headed to my room and came back from the room as soon as I entered the car