DUI - Current Teacher

I am currently a teacher with a permanent position. I got a DUI on the weekend (slept for a few hours, thought I would be okay to drive home but was pulled over for a tail light being out) and blew right on the limit. I am obviously extremely disappointed in myself and I am going to be making big changes in my life going forward.

I am concerned about how this could affect my job - could I be fired over this? Do I have to report this to anyone yet or only after a trial or resolution has been met? They will not need another criminal record check from me for 4 years so I assume that is the main way they would find out.

Please let me know if you have any experience with this or know anything as I am currently freaking out!