Re: 4 Days away and cannot pump to supply
Getting 3 oz from one pump session - while breastfeeding full time - is about normal. it doesn't sound to me like you're responding badly to the pump, but i agree you need to have a really good pump while you're away. 4 days is a lot at 3 months, and it would take most people a long time to save up a freezer stash big enough to last, so please don't feel like a failure that you don't. I really don't like formula, but one of the reasons it exists is so that our babies can eat when we must be away from them. If you have no alternative but to be away for 4 days, then it is way better to give your baby formula than to not give him anything! You might look in to whether you could get donor milk through human milk 4 human babies (check facebook for a group near you) or eats on feet.
Do you have any flexibility in the length of time you're away? Whether baby could come with you (with a caregiver?) to nurse at least at night?
Do you have plans to bring the milk you pump while you're away back with you? We can help you strategize about that. it would really give you a big jumpstart on a stash.
Last, are you saying you give 6 oz bottles? That's HUGE for a 3 month old. Try giving 3 oz bottles more often - it'll make the milk you do have last a bit longer, plus milk by itself can often be saved for the next feeding, while formula must be thrown out. So if you mix them, you lose the milk.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.