Welcome SeekingNewMe. Desperate times call for desperate measures...have you contacted your doctor since learning of the results? That would be your very first step in my opinion.
You can do this, and people can absolutely come back from this...but you will have to make it your absolute #1 priority over everything else in your life. Detox or rehab ( or both ) be necessary...make sure to consider those options. After you call your doctor, you may want to consider an AA meeting too - local support is going to be critical.