Same thing happened to me 23 years ago...I was "inadvertently" left off the approved commissionee list, and the Air Staff wasn't accepting waivers.
I ended up taking summer classes, enrolled for the fall, and got an add'l bachelors degree. Then commissioned in Oct, then waited a year to EAD.
Make the most of the time: get a job, continue school, chase tail, drink beer, go get your PPL, surf, climb a mountain, write a book, go on a very long vacation hiking thru Central America...
Or not. Your call.