How long has your supply been low? Has your day to day routine changed? I had a week where I was pumping 2-3 oz less per day, and it improved the following week. What helped me (I think) was getting more rest, being conscious of my water intake, and more cuddle/nursing time with my LO.
Are you stressed out? I was horribly stressed with a medically issue several weeks back and I went from pumping 110z at work to less than 5. Once I stopped stressing, it came back like nothing happened.
Re: Breastmilk supply just vanishing ???