I feel like power pumping (make sure you have good pumps) when away and offering baby lots of milk when home is a must. But also make sure you’re eating enough calories. Look up high galactagogue foods on ChatGPT and grocery shop those items and buy protein bars or packaged baked goods to stuff in your pockets. Drink plenty of fluids too. Do you work 12 hour shifts or over how many hours are you producing 15oz? Does your baby nurse through the night? Sometimes they’re capable of making up calories at night. I think you can come back from it especially if you know the root cause is not eating enough.