Medic, first off thank you for your service, you are truly an American hero and a bad ass. All I can tell you is if this is something you truly want it's not as hard as you may think it will be. With that being said it won't be easy at all, but wanting to be done with this addiction will go a long ways in your quit. Considering where you are what you do, you are going to have find new ways to deal with the stress you face daily, but I have no doubts you can do this. If you need any help, advice, or just need somebody to rip shoot me a PM I'll be glad to help you.
Please pass a big thanks from me and family to all the guys there with you, we are still supporting you guys and praying for your safe return home. I appreciate the fact you guys have the balls to do what I didn't.