I’m currently in the process of writing a song. I’ve got a tune and I’m putting the lyrics together but I’m always concerned that any tune I think of might just be another song I’ve heard somewhere randomly that I don’t remember hearing.
Do I just have a shitty memory or is this a problem that other people have too?
Not sure how to help you out with it, but you’re at least not alone. Robert Smith from The Cure had the same problem with the song “Friday I’m in Love”: https://en.m.wikipedia.org/wiki/Friday_I%27m_in_Love
“During the writing process, Robert Smith became convinced that he had inadvertently stolen the chord progression from somewhere, and this led him to a state of paranoia where he called everyone he could think of and played the song for them, asking if they had heard it before. None of them had, and Smith realised that the melody was indeed his.”
Similar story with Yesterday by the Beatles. Paul McCartney was convinced he had unconsciously plagiarized the song after he’d supposedly heard it in a dream.