Continued, routine breast milk expression is important to maintain adequate milk production during the time spent away from your baby. (stanfordchildrens.org)
If you can pump once every three hours when you are away from your baby, you should be able to maintain adequate milk production. (ayeletkaznelson.com)
Symptoms of an overactive thyroid include weight loss (more than is healthy for adequate milk production); anxiety; increased heart rate or palpitations; insomnia; feeling over warm; and sweating. (verywellfamily.com)