Dreams involving vehicles often symbolize the direction your life is taking or your level of control over your circumstances. In your dream, you begin by driving your own car, which suggests you feel in control of your life. However, the transition to a lorry—a larger vehicle that you do not typically drive—could indicate a shift in responsibilities or a feeling of being overwhelmed by situations that you feel unprepared for.

The crash may symbolize a loss of control or a fear of failure, especially since you mention not concentrating, which can reflect concerns about being distracted in your waking life. The rain could represent emotional turmoil or challenges that obscure your judgment.

The anger from others and your confusion about the situation might suggest feelings of inadequacy or anxiety about how others perceive your actions. The lorry being a children's vehicle could signify that you are dealing with issues that feel trivial or immature compared to the seriousness of the situation you find yourself in.

Being taken by police and your eventual realization that it’s not a hospital may indicate a fear of authority or consequences for your actions, but also a recognition that you may be overreacting to the situation.

Finally, your desire to find the real lorry and take pictures points to a need for clarity and evidence of your experiences or decisions. Overall, this dream reflects themes of responsibility, control, and the challenges of navigating your life's journey.

Consider reflecting on areas in your life where you feel overwhelmed or distracted, and think about ways you can regain focus and control.