Have you ever done something not knowing if you want to do it or not only to realise you didn't want to after you've done it?

I think I am having an identity crisis. I don't know what I am doing. And i don't feel like doing things that I am doing. I do things knowing that I don't want to do them and no one is forcing me. And it isn't because of the situation too. It's just I'm just doing them. Even when i don't want to.