What is it when your discharge goes from milky white like lotion to mucus like snot and its a lot,also milk from my boobs while im on depo shot?

Galactorrhea: It sounds like you probably have galactorrhea, which is benign milky discharge from the nipples. This is more common in women who have had babies, especially if they have breastfed, but it can happen to anybody. Depo can sometimes cause this. If there is any blood in the discharge, or if it is greenish colored, you should see a doctor.