Worried about baby's health...?

I am 18 years old and 15 weeks pregnant. I have had two miscarriages in the past from involuntary situations. I am in very poor health overall, I have horrible hormonal imbalances, as well as a whole host of gastrointestinal issues. I have a fair amount of medical training but wanted other's advice on what I can do to keep my baby healthy throughout the pregnancy. Please don't tell me to talk to my doctor, I already have, and am taking into account her suggestions. I would like to hear if anyone else has any ideas, especially regarding getting nutrients to the baby, as I have Celiac disease as well as another malabsorption disease where I can barely feed myself. So far baby is small and needs to grow a bit...any help would be appreciated.