YOU SAID:

im pain cupcake and i will eat someones pills

INTO JAPANESE

私はカップケーキが痛いので、誰かの薬を食べます

BACK INTO ENGLISH

I eat someone else's medicine because my cupcake hurts

INTO JAPANESE

カップケーキが痛いので他人の薬を食べる

BACK INTO ENGLISH

Cupcake is in pain so she eats someone else's medicine

INTO JAPANESE

カップケーキは痛みを感じているので、他の人の薬を食べます

BACK INTO ENGLISH

Cupcake is in pain so she eats someone else's medicine