YOU SAID:

my wallet's stuck sideways in my back pock

INTO JAPANESE

私の財布が私の背中のポックに横に立ち往生している

BACK INTO ENGLISH

My wallet is stuck next to the pok on my back

INTO JAPANESE

私の財布は私の背中のポックの隣に立ち往生しています

BACK INTO ENGLISH

My wallet is stuck next to the pok on my back