I have breastfeeding my 4 month old since day one, only pumping when I was engorged at about 3 months ago. My son recently began having issues with constipation. So, I tried to pump this evening so that I could add karo syrup to it to help him along a little, but was only able to pump out about 1/4 oz total from both sides. I'm not sure how long my son has not been getting any milk from me so I'm concerned to say the least. Is it normal to stop lactating while still breastfeeding exclusively? Any help would be greatly appreciated. Thanks!