Don't panic. Unless you are on the pad (waiting for mast) there is no reason to think you are going to lose your bird. You are still an ET3, and as long as you put forth a good effort, if your attitude didn't totally suck, if you can keep it together until your papers come in, they may bee good ones. In the old days (when the atoms were made of wood) lots of students were disenrolled for academic deficiency. The ONLY ones of that bunch who got screwed were the guys who had it coming.
But let's never, ever, ever lose sight of the fact that you have already gotten months of specialized training at government expoense. That training will keep you sitting in the catbird seat from now on.
Disenrolled nukes have been assigned to everything from sub tenders, to subs, to carriers, to shore maintenance facilities to the USS Constitution, to Antarctica.
Sorry you didn't make it. Half of my section packed their bags at the 3 week ac-board. I was sad to see them go, but it doesn't make you a failure.
Here's a little tidbit of happy news.
DeNuked ET's are prime candidates for the navigation department of nuke subs. They get the same food, bunks, ports of call.. etc as the nuke ET's -- only they get to go on liberty about 4 hours before the nukes who are still shutting down the hot-rock.
You're not where you though you would be, but you're still 80 - 90 % there.
Your parents are still going to be proud of you too.
Fair winds and following seas to ya.