Marilyn's Story Anorexia Nervosa

I am in my mid-fifities, I lost my husband March 9, 1998. I can only eat if I am with others, otherwise I go for days, eat nothing. Yesterday I had a peanut butter sandwich, today, two pieces of toast. I hate being all alone for the first time in my life. I lost 25 lbs, had only 5 to loose. Scared to death what is gonna happen to me. I have lots of support from family, co-workers, friends, but as soon as I am alone, like the weekends, I try to fill them. I like to starve myself. I am 5'7", even size 8 is baggy on me. I never had this kind of problem in my life. I've been to two doctors, one says you can never be too thin, other says I have a problem, like after six months, the physical side of the loss should be going away. What do I do?