I relapsed on meth after 45 days

I relapsed three days after I got .out of treatment. I am in a custody battle and have court next week. I meet the GAL on Weds. And I am hopeless lost and if they find out I've use again( which they prob will) bc I can't stop! I know I've got to ***. Get through the next two days and feel like *** and DEAL with it! I HAVE to!