As MadB says, the good news is that diet doesn't affect milk quality or supply. It is a myth that you need to have a great diet to produce enough milk - mums with very poor nutrition such as in third world countries are still able to produce enough milk for their babies. However, as I'm sure you're aware, it is important for you own health that you eat well as the baby takes the first pick of the nutrients. It's great news that you are feeling so much better with your diet changes.

Some mums find that some foods, such as cabbage, onion or chocolates seem to unsettle their babies in the early weeks but this usually doesn't last very long. Vomitting after feeds is very common - like you my first DS didn't vomit much, but DS2 was a happy chucker - throwing up after every meal for months. In most cases these things settle down within a few weeks. If it doesn't you might like to talk to a CHN to check out whether anything else is going on and/or a dietician to discuss food allergies or intolerances, but it sounds very normal at this stage.