Deployment and Disappointment

So this is an interesting end of the day, and also an interesting 2nd post but I need to get this out before I lose it. Not angry, just disappointed and frustrated and scared all rolled into one. Not really the best combination as anyone can understand. So B, my husband, is in the military and has been for over 10 years. He's my hero and I'm incredibly proud of his 2 deployments including a 2yr stint in Iraq, however we just got word that he's most likely going out on deployment #3. He was hoping to attend graduate school and get into a special program in the military that would keep him home during that time for him to complete the 3yr schooling and 1yr internship. However, because the school he's planning to attend isn't accredited he can't get into the special program, which means if his unit gets deployed when they're scheduled to he'll make it through less than half that before getting sent overseas. Now I'm not upset about him needing to do his duty because I knew when I married him that it was an option it's more that we now have a timeline on the time we get together, all of our plans are being upheaved and we're not even sure where we'll be living when our lease is up. (We were planning on living on the campus of the graduate school).
All of this tends to make a person scared. Scared of how everything is going to work out, scared of him being deployed, scared he won't make it back, scared of being apart for that long and then suddenly being back together again. Scared because of an agreement we made when we got married regarding if he ever got deployed again, and the consequences of said agreement. I'm frustrated that the military won't allow him to be trained at the school he chooses simply because of a technicality.
I wouldn't be surprised if what I'm saying doesn't make any sense to anyone but me but honestly i just needed to get this all out before I emotionally lose it. Hopefully I can do so w/o reproach.
I'll do my best to be more positive next post but for now I'm just frustrated and scared. I'm not ready to be alone and he doesn't want to leave, but we both understand the duty. The rest is in God's hands.