Is there ANYTHING I can do to keep my husband from going to IRAQ?

I need help, possibly psychiatric help. I just got the devastating news 2 days ago. There is a good chance he will leave in just 2 weeks! He will be gone for 15+ months. Everyone says I am strong and I'll do fine...it's not true. I am sure of it! I will not be able to go on. I know there are so many people that have had their loved ones go, and many have not returned. I also know that I cannot and will not deal with it. I have three kids and I am a full time student. I barely get through as it is...I am not as strong as I let people think. Since I have found out I feel neglectful almost. I don't want to get out of bed, the depression consumes me. I want to kill myself if he leaves. Someone help, can't he stay? I need answers...and not the ones that tell me it'll all work out yada yada yada...please help me, I've gone crazy, seriously.