Listen to as many songs from as many styles as you can.
Then let your friends (honest ones) listen to the songs.
Drop the ego, ask them if it sounds like any other song.
If it does, ask them to point the part that's similar to them.
From this point on, it is up to YOU
Many successful songs sound like some other song. There is only 7 notes in western music. 12 if you count the outer tones.
You decide whether you want to change, or to just go ahead with the song.
Personally, if the chorus sounds too similar to another song, I would change it.
Pier.