I EBF but my supply is low and I have to pump at work and bring home my small amount and my daughter has gone thru all of my freezer stash!

We try giving her formula to supplement and she projectile vomits. She is fine with my milk but this is the third time with a small amount of formula and we even did half formula and half milk and she still can’t handle it. I don’t know what to do and worry about her being hungry when I am at work.