Husband in Denial Excessive use

My husband was going through a 30 day Oxy prescription in 10 days. For months I would find prescription looking pills that were not his as they were a different color and had a different dosage written on them when he was out of his meds.
Says it’s not a problem only a high tolerance and always said “ if. Have a problem how am I able to go to work”. 6 months ago he was switched to Buprenorphine but on day one mixed them with his Oxy we went to the ER as he was having heart palpitation when I told him we have to let doctors know what he did , he refused to go inside . ( even after admitting he mixed he blamed the episode on his jog)
Spring forward to current day I noticed all the same mannerisms and sure enough found Mexican tramadol. When I confronted him same answer he only had a high tolerance and he had to hide because I am judgmental.
His only question was how did I know?
I didn’t even try to explain what I see, what others see and have asked me about. I feel at a loss as what to do, every time he gets caught he becomes
Religious , loving, for a period of time .
After 4 years of this roller coaster I feel like he does this to take my focus off his lies and usage. He recently lost his job , but it was a layoff of several so he refuses to think his pill usage had anything to do with it but he forgets that on the other hand he is so quick to say what a good worker he was , he doesn’t see that it doesn’t fit.
I fear this is only going to get worse!
Any advice ? Is it just a high tolerance ?? As he says