I Tested Positive

I'm a meijer employee, I was promoted to lead a few months back, and i had my hilo certification. I messed up, broke something on the hilo, had to go for a drug test. I got a call about 30 minutes ago informing me that I tested positive for marijauna on the test. I do indulge in edibles on days i don't work, but I live in a state where it's legal. I won't be back to work until the 19th, i have a few days off as my grandmother just passed and i am using bereavement time.

When I go back should I prepare to be fired? Is there any way at all that I won't be?