Hello,

You have to make efforts to come out of this phase, else it's not going to end ever, whatever happened in the past, let it remain there and start afresh, you can practice meditation and yoga, it will calm you down and eliminate stress and anxiety, and also you'll be able to think clearly regarding your future goals in life and accordingly pay attention to the same, setbacks or failures are common in everyone's life, but then it's the sheer ability to surpass these which matter the most, and you need to have the belief in yourself first, much more than anything. and it's never too late to start anything, you're still young and have ample amount of time, just focus on what all you can do and have control over, leave behind everything that's not in your control.