Is there anything other than pregnancy that can cause lactation?
Lactation could happen even if you are not pregnant. I’ve known of women who breastfeed their adopted babies so in that case they never got pregnant. They breastfeed with the help of milk inducing medicenes. But these types of medecines play with the hormones -Prolactin is a very good cause of it. if Prolactin hormone is too much in the body it might lead to a fluid flowing out of the nipples. Its not good if that is the case because it might lead to infertility also and as you are saying that your doctor has told you that you can never be pregnant I want to say that no doctor can tell you if you’ll ever have a child or not. its all in God’s hands. But if your prolactin is high then it can be corrected with medicenes. See a good reprodutive endocrinologist for fertility meds.