This is pretty common among younger mothers and those who are not afforded a private room to express milk. Let's face it, from a hygiene perspective, the bathroom is not the ideal place to do this. Breast milk production operates on a supply and demand basis, and when milk is produced and not used, it will cause you pain, and your supply will begin slowing down. Speak to a decision-maker at work so a private room can be designated for you to use. Put the embarrassment aside and focus on the goodness you are providing your baby. But if the situation becomes unbearable and your job is your lifeline, first speak to a lactation specialist before considering moving to formula.