J.L.
I would not change your work schedule yet. It has only happened twice. Does she cry when you are there with her? Try talking about schedules with your mom, when does she feed her, how, where in the house. Is it too hot or cold? Candle burning? Dish detergent? Temp of bottle, size of nipple, so many factors. Other things may be causing this, a cold or gas, over hungry, overtired, no hungry.