Have you tried not squeezing the breast for a while? You might be stimulating production.
See your doc also, and get your prolactin levels checked.
So, I had this many moons ago and it was a hormone imbalance. They checked me for a small, non cancerous tumor in the pituitary gland as that can create this situation of prolactemia. I didn't have it. So, we then looked at my hormones. I had a natural excessive production of estrogen.
So, talk to your doctor about this as you likely have one of the above two scenarios. Let us know!