I think I've had an epiphany.?

Lately I've been feeling a bit odd. I've been thinking about really weird and unexplainable things. I feel like I technically don't exist. I ask myself questions related to life. Phylosophy. I don't feel alive anymore. And it frustrates me not being able to find the answers to these questions. It's happened before, about a year ago. but not for this long. now, i feel obsesses with what's going on. I think I need psychiatric help. i hate to sound cliche but i feel extremely alone in this world. what is going on? how do i distract myself from these thoughts? i literally think i'm going insane.