If so, what do I do about it? Do I have to make a pact with myself to never show anyone my music ever? To be fair, I'd rather "make music by myself and not show it to anyone" than "be afraid to make music at all".
the curse is not necessarily that other people heard it, the curse came from the fact that you participated in their listening -- you showed it to them personally, and you heard their reaction personally. this can be avoided by instead posting it somewhere where people CAN find it, but you don't know exactly who and when