Terri, you've sure got your hands full! ((HUGS)) to you from one teen's mom to another.

I'm not sure what questions you want to ask, but I think I would start with his school counselor. The counselor should be able to help you with what are signs of drug abuse, give you resources for where to get help for him if necessary, talk to teachers about any changes they may have observed, and just generally be a shoulder to lean on. Your family doctor is another good resource.

Do what you think needs to be done. Your mom radar is obviously picking up on something and after 4 kids, I'd say your radar is probably pretty accurate.

Addressing this issue will be incredibly tough on you, especially without your husband's support, but it could "save" your son in so many ways. God bless.