Re: help please - weight gain issues
Welcome and congratulations on the new baby! I'm sorry you've had such discouraging turns of events, but I think you should be confident that if you have a problem, it is almost certainly fixable.
First of all, I am not sure that there is a problem. Babies often follow one growth trajectory inside the womb and a diffent trajectory outside. There are babies who are born big and then grow relatively slowly, and babies who are born small who rapidly shoot up to the top of the charts. What is important is that the baby continues to gain weight at a consistent pace: you want to see the baby gain at least about 5-7 oz per week for the first 4 months ( see http://www.kellymom.com/babyconcerns...ight-gain.html). That sort of weight gain doesn't always maintain the baby in the exact same percentile he was born in.
The 2 things that concern me most about your post are that you've been taking hormonal contraception and that you had that awful NHS botch with the estrogen tablets. The mini-pill is supposed to be safe for nursing moms, it's not supposed to impact supply, and plenty of moms take it without ill effect. However, some moms notice that the mini-pill has a negative impact on supply. If you're still using the mini-pill or any other form of hormonal contraception, I think it would make good sense to choose an alternative method until you are certain that breastfeeding is back on track. We'll be happy to critique various methods and help you pick one that is safe for breastfeeding and right for you!
To me it sounds like you're doing everything right and that things are going well. Good diaper output, consistent weight gain, and a baby who seems satisfied are good indicators that things are going right! However, if you are told to supplement at your next appointment, let us know and maybe we can help you figure out whether or not you really need to supplement, and how to do so in a way that will help you succeed at breastfeeding if you do need to supplement.
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!"