Re: Overactive letdown and swallowing a TON of air
3 weeks is still very little. It can take a little time for babies to grow big and strong enough to cope with a really fast flow. The good news is that even if you do nothing at all now your baby will likely do fine with the fast letdown as he gets bigger, but there are still some things that you can try now to help him. By "antigravity" do you mean nursing in a relined position? Nursing while leaning back on a few pillows can work very well, but it can also take a lot of adjusting the position to find something that works for you. Nursing in a side lying position can help with the overactive letdown too. You might want to also try the opposite, nursing very upright. My son would often nurse more calmly, without the fussing and arching, while upright in a sling or carrier. This would also help you keep him more upright in a sling/carrier after the feed, which helps a lot with reflux too. The sling/carrier also helps you get some things done while retaining the frequent feedings, which are actually much better for overactive letdown than are more spaced out feedings. You can also try removing your baby from the breast at letdown, letting the milk spray into a towel, then relatching your baby.
ETA: and Mommal is, of course, absolutely correct as usual. Getting some help if you can for the few weeks is a great idea.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).