Quoting Sarah Latham:" Quoting Mama Lizzy :]:" Just because you can only pump an oz doesn't mean your supply is horrible....I ... [snip!] ... and still wants the blood test but if the docs won't do it then that's between them 2, grrrrr she really is not a nice woman"
Sorry, I don't mean to intrude but that sounds awful! I am sorry you are having to go through this... sounds like she is just scaring you for no reason. If your little one has not lost weight and has gained I wouldn't worry about it much.
Pumping is not an indication of how much milk you make so she would have NO WAY of knowing how much your making unless your little one is not peeing and is losing weight.
If you are worried though you can take the funagreek and blessed thistle as a precautionary measure. It wont cause any side effects or hurt your supply...some people just can't believe that woman are capable of breastfeeding and that breast milk is generally more nutritious then man made formula. Also, BM is the best for Jaundice. My son had it when he was born and the hospital said specifically to not use formula if possible because BM digests faster and they tend to eat more frequently on it.
I also had doctors try and tell me to supplement later on because my son lost percentile(not weight)....I told em to shove it and my son was happy and healthy and went on to BF until 13 months. I hope you can get it sorted out!
Just remember to feel confident in your abilities. You can also see if you have a local La Leche League near you in order to get personal support. It helps a lot to have encouragement in your life! You need to know that every oz counts and if you slowly stop supplementing your supply will greatly increase. I think you are doing amazing!