I didnt have my milk come in until the baby was born as well, its normal to not have mich before hand. Like jgarciamua said its not the size of your breast to determine milk production. But, there are a few ways, pumping is definetely one, hand expressing the milk, fenugreek is a pill/ vitamin for breast milk production, Mothers Milk is a type of tea for helping milk production, Drinking a lot of water, even though this is weird to say or consider your hubby/ bf can drink from you to help produce more. Make sure to be constant with pumping or feeding, try not to stress because it will cut back on milk production. Try to feed every hour to every 2 hours to see if it will help over time.

The size of your breast doesnt indicate how much milk youre producing. Your milk supply comes in 3-4 days after baby is born