Quoting Samanthaaaa ♥:" <blockquote><b>Quoting EpicThunderCat!:</b>" Supplementing will destroy your supply ... [snip!] ... Yes I know, but I have no choice. Just went back to work full time and I don't get anything when I pump."
Have you tried taking funagreek and blessed thistle to increase your pumping output? You can also take mothers milk tea with those herbal supplements.
There is also donor milk. That is what my friends is doing while she is in class full time. She uses donor milk while in class and then breastfeeds at home because her son has a lot of allergies and can't take formula at all.