I know that you must be feeling blind sided by this. The most important thing is that you take care of you and your kids. I'm not trying to scare you but his having drugs in your home is grounds to be investigated by DSS. He's making sounds like someone with a probelm - if someone gets defensive it's because they are protecting something. By the time that someone has razor blades and rocks it is pretty serious. As far as riding with him goes - how do you know when he is using or not? I'm glad that you are getting to a meeting. Read all the stickys and know that we are here for you.
hugs