Heroin & Fentanyl Withdrawal/restarting my life

I feel like I have lost my lust for life bc of my addiction so that's y I decided to stop using. You know your life is a mess when your dreams seem more appealing than your actual waking reality. My reality is filled with darkness, failure, pain and despair and I need my life back. I can't do this anymore... I know I'm going to be in deep pain and going to be crying for my life to end for the next week or 2 due to the withdrawals but Idc. I need this nightmare to end. Hopefully there is a light at the end of tunnel when all of this is over. Please God help me.