Re: Excessive Vomiting
It sounds like the spitting up is really just a positioning problem. When the baby has a full tummy, laying him down means that gravity is no longer helping him keep his stomach contents down where they belong.
If you would rather change baby before feeding him, I think that is okay even if that means he nurses on just one breast per feeding. He's gaining fine and has plenty of diaper output, which suggests that he's getting plenty of milk. With a baby who is gaining normally, you can take a "finish the first breast first" approach. Instead of trying to get the baby to take both breasts at every feeding, you allow the baby to take the first breast at his own pace. Then you offer the second breast, and the baby can take it, or not, as he desires. Just watch his diaper output and weight gain- if they aren't what they should be, you would want to go back to making sure baby takes both breasts at a feeding.
Spitting up in an otherwise healthy, happy, growing baby, it's a laundry problem, not a health problem. Just make sure you swab out baby's neck folds with a washcloth or something- the spit-up can get caught in there and fester and cause a lot of skin irritation.
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