Yes, Ive experienced this. Im not certain its a symptom of depression or something else. Have you been to a doctor for a diagnosis? What you're experiencing is very hard to deal with. You might even feel you werent clear in your post but you were. I strongly suggest you find help with this. I struggled with it for 2 or 3 decades. Things can improve but you need knowledgeable help that I had difficulty finding/accepting. Help is available. I'll be praying for you. Keep reading and posting. Reading others posts has helped me learn to articulate my own feelings, so we are all helping each other here in some way. You too. Im glad I wasnt the only one who ever felt that way, but Im sorry you're having to deal with it too. I think it happens when the floor falls out beneath us because of multiple emotional upheavals.