Re: Question vomit. Long, I'm sorry.
Once supply and demand are well matched, feeling soft, empty, or floppy all the time is normal. Feeling full or engorged is a sign of your body making more milk than the baby is taking. If you're nursing frequently and on demand, and baby is gaining sufficient weight and making sufficient diaper output, you shouldn't worry about feeling floppy.
It's hard to say why you're getting frequent plugged ducts. Here are a few possibilities:
1. You're making more milk than baby needs. Making extra milk makes plugs more likely.
2. Your supply is not excessive, but the baby is unable to empty the breast well. Leaving lots of milk in the breast could be contributing to the plugs.
3. You just happen to be more than usually susceptible to plugs.
4. There's some sort of physical factor that's contributing to the plugs, e.g. a poorly fitted bra, a weird sleep position, an imperfect latch, etc.
I don't think that yeast is associated with plugs... But that being said, painful pink nipples does sound yeasty. Is there any cracking or blistering? Is the pain more of a burning or more of a stabbing? Does it intensify at any time, perhaps after a feeding? Do you have a yeast infection anywhere else on your body, or does the baby have a yeast diaper rash? Do you ever see any other color changes in your nipples, e.g. blanching (turning white) or turning purple?
According to kellymom.com, a sufficiently wet diaper for a baby >6 weeks should contain about 4-6 tablespoons or 60-90 ml of fluid. To feel what that feels like, just pour that amount on a dry cloth diaper. You want to see at least 4-5 wets per day, and the urine should be pale and mild-smelling. Remember that most poop diapers contain urine as well, so they should be part of the total count.
Taking a baby off of formula depends, in large part, on how much you're using and how much you're nursing. Can you tell us how many times a day you're nursing now and how much formula you're offering?
When it comes to a pediatrician, you want a doctor who looks at the whole baby, not just the chart. If your pediatrician suggests supplementing based purely on the chart or on how much weight the baby has gained in a given time period, without doing more investigation into the baby's feeding patterns, then you might want to see a different pediatrician and see if that person comes up with the same advice.
Don't let the kellymom thing about establishing breastfeeding destroy your confidence. I think it's EASIEST to establish milk supply in the first 6 weeks, but that's all. Your body can do amazing things, given the right input!
A baby who just got some vaccinations can be expected to be sleepy and grumpy for a few days. Letting her sleep is probably okay, but if you can wake her every 2-3 hours during the day, I think that would be beneficial for both of you.
You should be able to feel the baby's fontanel (soft spot) until it closes around- what, I think it's like a year or so? Dehydration will be evident in a sunken fontanel, a lack of wet/poopy diapers, dark-colored urine, skin which is slow to rebound when pinched up, sunken eyes, dry mouth, cracked lips, lack of tears, and fast pulse and breathing.
When in doubt, just put that baby to the breast! I bet that's all it's going to take.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"