To answer some questions that some have asked:
I do not still nurse, just pump and feed from a bottle.
She has no issue taking the bottle of breastmilk (we use the Playtex Dropin Liner bottles with the Breastlike shaped nipple)
I have not mixed feeding her solids and formula (as that would be a disaster with her vomiting.) And FYI, my ped. recommending me starting her on cereal/some solids when she turned 5 months. I already feel defeated that she throws up formula, so the comment about me feeding her what was recommended by my ped. doesn't help with this issue. If i felt it was bad, I obviously wouldn't feed it to her. She takes solids and cereal fine.
I use a Medela double electric breast pump.
I pump every 3 hours. (even setting my alarm to wake up in the middle of the night, esp. since my supply is getting low.)
I greatly appreciate all of you giving advice. We go to the doctor tomorrow. (She is 10 days shy of 6 months)
I am not lazy about the pumping and feeding, trust me, I am very very dedicated to it, but I have reached a point of mental and physical exhusation with it. She is healthy. I am just trying to find a formula option for her, and it saddens me that nothing has worked yet. Being a mama is the most rewarding thing ever-but also the most challenging.
Updated
I make all of my own "goo". I know exactly what is in it.
I want you to know you have really stressed me out. I wouldn't starve my child. Your terms about dying, starving to death, etc. are a little over the top. You have really made me feel like a "bad parent" and I do not appreciate it. I came to this forum for advice, not to be repremanded on what you feel I am doing wrong, or that you don't agree with my daughter's ped. And, your concerns about babies being obese doesn't have anything to do with this, but thanks for throwing your two cents out about that too. My child is fine on height and weight, it is pretty sad that you go from telling me that I am "starving my baby" to "roly-poly" is not a good eater, but means they are obese. I, however, do appreciate your opinion, I just wish you weren't so "in your face" about it. I am always open to suggestions, which is why I chose to reach out. I hope that other people, who may have an issue similar, can take some information from this and use it to be beneficial to their own problems. It is very very stressful when a baby is so "young" that you can't just ask them what is wrong. The world is full of so many opinions, and that is all I was simply reaching out for. I am honestly hoping this doesn't come across in the wrong way, I am just a little on edge and it just seems like an individual is "out to correct me" on everything. I am frustrated and stressed enough, and don't need the extra jabs. I have an appointment set up for tomorrow, and I would love to share what I find out, but probably won't, simply to keep piece of mind and sanity from unnecessary comments.