Is it normal to randomly wake up and just not care about anything anymore?

Every now and then I'll have these days where, just completely out of the blue, I'll wake up and just feel completely numb. By numb I mean I will wake up and just not care about anything. I might think about something I was extremely excited about just the day before and on days like this I'll think about that thing and just not care. I'll have no interest. The things I enjoy doing will suddenly feel boring and pointless, things that make me happy will no longer bring me joy and I just become robotic. It's kind of like I'm running completely on auto-pilot. I get days like this at random and I can't think of anything that causes me to wake up with this emotional numbness.