Why do you think an OTC supplement is going to fix a root issue?
You need to get bloodwork done, seek a professional, and get to the bottom of this.
The thousands you have probably spent in trying to find a "Supplement" to fix the issue is wasted time (In your case years), and a lot of blown money.
Put your money towards your health, fix it, and then live a happy life when you can diagnose the issue, sleep, and get the cortisol lowered.
I don't get why you are so inclined to think a pill or powder is magically going to fix your long term issue. You have tried, you have failed. Now you need to go o find a professional to fix the issue.
Yes, not the answer you want to hear, but you are not going to get anywhere but continue in a downward spiral until you do so.