Music appears to have deleted MY AUDIO (as opposed to copyrighted works of music, et al)

Not sure when exactly this happened, but for YEARS, I have enjoyed using Music as an archive of recordings of my work and random things like a recording my grandpa made of my grandma and dad singing when he was a toddler. I come from a family of musicians. I'm a public radio journalist in the business for a quarter century. Just yesterday, I went looking for one of these audio files on my phone and no sign of it. Went to the laptop, and no sign of it there, or ANYTHING ELSE I UPLOADED over many, many years, as opposed to downloaded back when you could do that with iTunes. Where did everything go??? I sure hope it hasn't been automatically deleted...