Autoimmune
American Autoimmune Related Disease Association
National Institute of Allergy and Infectious Disease
Autoimmune Wellness (AIP protocol)
List of autoimmune sites by specific diseases is here
Pregnancy
High Risk Pregnancies usually require individualized care, but see here and here for two organizations that have general information
Other sources of information about health
UpToDate has information about drugs and specific conditions; it may require an affiliation to gain access to the full file
PubMed is a searchable database of medical articles. Some are freely available, most have at least an abstract that’s available