You are on the MLC diet, which is very popular on this site, although it is acknowledged to to be very unhealthy. I myself went from my pretty stable weight of 134 pounds all the way down to 112 pounds, in just six weeks or so, and I stayed under 120 for about a year (by now I'm back to almost the weight I was before the bomb, and am working to lose some of it again, but in a more healthy fashion this time). Almost overnight I developed raging cases of both bulimia and anorexia (the bulimia has been a minor issue off and on for years, but the anorexia was brand new). I simply was too upset to eat, although I was physically hungry sometimes. I basically quit sleeping for two weeks after the bomb, which didn't help. I went from size 6/8 to size 2, and none of my clothes fit. And my H (who was always pretty observant) never admitted to noticing, although many other people did, and several told me I was becoming almost emaciated. So...keep in mind, you are not alone.
Welcome to MLC. It's not a fun place to be, but at least you have a lot of good people here to keep you company. Strap yourself in, because it is going to be a longer ride, with bigger hills and valleys, than you can possibly imagine. Read everything you can here in the way of resources, and follow the suggested courses of action; it really does help! Your H sounds fairly typical of MLC to me, so I suggest that you read whatever you can about that too.
Take care of yourself!
Peace and blessings, Dawn
Me 45/H 47, no kids Together since 1985; M/1992 Bomb1 (EA-OW1, age 22) 2001 Bomb2 (EA/PA-OW2, age 22) 10/2007, A continues H left 11/24/08 minimal contact, no legal action http://tinyurl.com/DawnHope1