*** If you have a copy of your GED it’s equivalent to a high school diploma, if not enrolled in a school to take the GED class (ASAP). Take the pretest to see where you stand you might do so well and pass on the first try and if not see what you need to work on. You seem like a very smart person you can pass the test.
*** Inform your supervisor that you don’t have your diploma but you are working on your GED. If you don’t its might be automatic termination and if you put on the application that you have your diploma and you don’t it’s falsify information that too, could be automatic termination. Make it a matter of prayer and hope for the best. BUT all means don’t avoid the issue it so just going to make matter worse.
If you weren’t honesty on the application that changed: (from this point on being honest it might save you)
Happy testing