I'm sorry, Florence. We do learn the signs, don't we? I wish it hadn't happened, but since it did, you did all the right things. Hitting bottom, whether it's the addict themselves or those of us who live with them, isn't always a catastrophic event or fireworks or even anything we can put our finger on. We just know that we're done.
Get some sleep and try not to worry about it too much. As long as you keep your focus on what is best for you and your children, everything will be okay. (((HUGS)))