In May my 16 yr son came home and appeared "off." I grew with with a brother who used drugs and instantly knew what he was up to. We confronted him, at first denied, then when we told him we'd take him to the hospital in the AM for testing and his consequences would be far less if he came clean. He admitted to smoking weed, at first said it was the first time. Prior to this was a good kid, good athlete, good grades, always home at curfew, etc. I was only suspicious as he was hanging out with a couple older kids. Long story short, I've urine testing him a few times since and it's negative. However, as an athlete he has a really high metabolism so I'm sure his body processes it quickly. However, in the last couple weeks I've found suspicious things - part of the inside of an ink pen (this is what he confessed to smoking with in May) on the floor of his truck, odd behavior a few nights so thinking smoked several hours before coming home, one night had a lazy eye (not the norm), evidence that something has been hidden in the ceiling tiles in the basement (nothing there now) and a few phone calls to the kid he was caught with. I don't have anyone to talk to this about, as I don't want to tell any of my friends. I cannot get this off my mind, literally it's consuming my life. Do I keep testing him, keep searching the entire house every week. I'm exhausted. I watch his money extremely closely (can see his online bank info) and I know he isn't spending much on this. I think it's a fairly recent habit but I'm terrified it will progress. I had a brother who destroyed his life because of drugs and this is all I can think. Please help!!