Is it normal to just randomly get sad?

I’ve been feeling pretty okay, but I’ll randomly get bummed out for no reason, and suddenly everything loses its appeal and all I can do is stare at a wall, or cry to sad music. And for no reason too. I don’t even have to think anything, it just feels like my soul is hurting. It happens mostly at night, but sometimes in the day. It’s so random, and it really sucks, and I just want it to stop. Is there a reason for it, or am I just being overdramatic?