YOU SAID:
dont worry about a thing
INTO JAPANESE
事を心配いけません
BACK INTO ENGLISH
Do not worry about a thing
INTO JAPANESE
何一つ心配しないでください
BACK INTO ENGLISH
Please do not worry about anything
INTO JAPANESE
何も心配しないでください
BACK INTO ENGLISH
Anything please do not worry
INTO JAPANESE
何も心配しないでください
BACK INTO ENGLISH
Anything please do not worry
Come on, you can do better than that.