I recently realized that my head is always full of various questions.

Recently, I've started to notice that at times I wonder if I'm living the right life. I do not know how to explain it, but it happens involuntarily, I do not intentionally think about it. It feels like everything should be different. I am also accidentally tormented by the question of what will happen next. I'm very afraid to think about it. Also, sometimes I'm ashamed to look my parents in the eye. But even I don't know what it is, and why I'm ashamed. Maybe someone knows what it is and how to deal with it? Or do you have any advice?