I have been breastfeeding since my LO was born and he is now 2 months and i have been back to work for 3 weeks now and pumping while I am at work. I can pump 10oz in 8 hours but when i get home my son wants to eat so I bf him which takes 30 to 40 mins and then he wants to eat again a little while after but no milk comes out. I don't hear him swallowing and he gets mad and pulls away. So i have to feed him a bottle of formula to please him. Please help me! I am so upset about this and I don't know what to do!