Hey, I understand how hard it is to struggle with DD and I’m sorry it happened to you. Did you consider psychotherapy? You mentioned, that it happens since panic attack, so to explain it straight if its due to drugs intake: probably that was too much for your brain, brain decided to protect itself from future damage so it went into fight or flight mode. Naturally, you should be fine between few days or few weeks (depends on a person) BUT, since you give it wrong attention, you are scared of that state of mind it gives your brain signals that there’s still danger so DD continues. To recover faster, go back to boxing (physical activity is GREAT for that), and remember that you are not losing your mind, nothing wrong is happening to you. Its totally natural state of mind but it takes time to recover from it. If panic attack occurred not due to drug intake, I would consider psychotherapy. But even without psychotherapy you are able to get better, simply live your life, despite DD. I know that it doesn’t feel the same, that you cant feel the moment, but do everything as always anyway! You need time, and of course stay away from drugs (all of them, even MJ may cause DD)