You are doing all the right things, sweetie. If anyone sat out front of my house for 6 hours, I'd call the police too. You are thinking "past" the love for him and going straight to the "safety" for you and your child. That's all good and will help you stay safe.
You are stronger than you know, and wiser than you think, just remember that and in times of crisis continue to do what you need to do to stay safe.
We all understand here, we too have struggles with the hard decisions when it came to our addicted loved ones, and the one common ground we all have is that we need to let go of the fear and just take good care of ourselves.
Hugs