Just found out that there is mold in my house. is there any link between mold and autoimmune diseases?

No: A number of individuals who have found mold contamination in their homes have, later, developed autoimmune disease, but there is no clear cut, reliably proven connection between autoimmune disorders and mold contamination in homes. Autoimmune disease is not uncommon and is based on a number of factors such as heredity, age, some types of medications, and other causes.