Re: overactive letdown, 3 week old baby, please help :(
with PPs on holding off on the pumping and the bottles, as well as nursing in a reclined position. I had an insane, spray across the room letdown, and nursing while reclined saved me. I would lean back on a few pillows, put my baby on my stomach or chest, and let him latch. It can take a lot of tweaking the position to find something that works, so keep at it. You can try nursing in a side lying position too. My baby did like to nurse more upright when I would nurse him in a sling or carrier (love my Ergo) while walking around. Because poops are normal looking, I wouldn't get too aggressive with block feeding just yet.
Very frequent feedings are good for both overactive letdown and oversupply. So make sure NOT to limit time at the breast or space out feedings.
For the miserable gas (oh and how miserable it is), I needed to give a tummy massage and bicycle my son's legs between every single feeding to work out the gas incrementally throughout the day. I also needed to give a warm bath (occasionally more than one) every evening, usually bicycling legs before and after. Holding your baby upright in a squatting position can help pass the gas sometimes too. I also gave a little lower back massage, which seemed to help a little with the pain.
I would NOT introduce a pacifier or a bottle just yet. Three week is a little too young for that yet. You should wait until at least 4 weeks, or ideally wait until after the growth spurt around 6 weeks has passed.
Right now do NOT pump or give bottles. The best thing to do for overactive letdown is exclusively nurse on demand. I agree with PP about waiting until 1-2 weeks before returning to work to start stockpiling milk.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).