Songs not available in country or region

I haven’t changed anything with my phone but I came back from work and suddenly all of the songs that I listened to on the way there are now suddenly not available in my country or region, other songs still are, including ones from the same albums but it’s conveniently only the ones I listened to this morning, I have no idea what to do, I’ve deleted and re-downloaded songs, I’ve shut down my phone and turned it on again and nothing seems to be working, what has happened?? Please help me