I am wondering why you say you have no one to blame but yourself? I am sure you do not want to be hurt to the point of taking prescriptions. So...there is no one to blame but him for taking them. My father in law when he was sick on hospice could not be trusted around pills, they were locked in a fireproof safe that he did not have the key to. That took care of that.
I realize your husband is a different story. I don't know if he is the type to get them from somewhere else if he is not taking yours, then that would be a different problem.
I hope you are getting some sort of support as mistrust such as this can eat at you until you become very bitter. I hope you don't let that happen to you.
Keep posting, you are not alone!