Hey, cj, welcome to PsychCentral (PC). I had a couple of thoughts when I was reading your post.

Do you have trouble or as much trouble when you're home on leave as you do being over in Iraq?

Have you ever explored thinking whether it might be easier to focus on these unfounded thoughts and problems rather than on more "real" ones that you don't feel able to work on?

For example, my mother died when I was quite young so I have kind of built-in fears of being abandoned, caretaker dying, etc. A funny thing is, I lived in Washington, D.C. by myself in an apartment for 13 years with no problems but when I got married, when my husband would go out of town on a business trip, I would have to stay up all night for fear someone would break into the house while I was alone. I couldn't get to sleep until 4:00 a.m. or so when I was sure they had all gone home to bed :-) There were no robbers of course, but it was probably psychologically easier to focus on something that was a fairly sure thing NOT to happen than focus on the fact that my "care taker" had gone away? (who after my mother died, I centered on my father, and when he'd leave I'd get upset; so now I'm 57 and my father's dead, so I focus on my husband, etc.) . Do you see what I'm saying/asking? I had a zillion years of therapy and am not as anxious as I was, can go to sleep as long as the lights are all on at 3:00 a.m. now