Strange feelings after meditation and mindfulness practice?

I started to meditate half a year ago with my first Vipassana retreat in Bodhgaya. I'm trying to meditate every day since then. Around two months ago I started to practice mindfulness and try to bring meditation into my daily life and not to be mindful only on the cushion. Last week I was getting some strange results. I feel like almost all I do is automatic. I don't feel that it's me who is doing it. When I talk to people, going to work, riding on the bus. I feel like I'm watching the movie. Two days ago I was watching my breath on the bus and when the bus stopped I couldn't move for two minutes. It felt like my will was totally gone. Before, during my day I felt that I wasn't present. Now I feel present but detached, and not in a good way. Am I doing something wrong? Or it is only a stage of the practice that I must go through? Thank you for your answers.