Oh my gosh, so sorry for your question going unanswered for so long. This is very important. It's obviously time to really get serious about the anorexia. It's a difficult diagnosis in general. It can be difficult to get proper nutrition when pregnant and having an eating disorder and so babies can then have a low birth weight. Trying to get the right number of calories as well as staying hydrating and not over exercising will be your challenge and one to take seriously. Do you have a therapist you work with? How are things going?
Here is some information from the March of Dimes regarding anorexia and pregnancy. It talks about the risks and encourages women to work with their doctors and therapists especially during pregnancy. https://www.marchofdimes.org/complications/eating-disorders-and-pregnancy.aspx