feelingnothing

Does anyone, anyone at all, experience an Existential Crisis, just out of nowhere sometimes? Like nothing triggers it. One day I’m feeling great and then throughout the day I start to feel down and start questioning everything and life and the repetition of life. It makes me feel numb and nothing. I don’t want to do anything. I also have depression and anxiety and I am on medications. But I don’t know what’s happening to me.