I have a few question, I have a 3 week old girl, I’m breast feeding but I’m not producing enough milk to feed her, so I have bought various types of formula to try to feed her, all the ones I’ve tried she spits up, I know babies spit up, but its more then the occasional burp spit up its like ounces at a time, ive tried to feed her breast milk every other feeding, but I think that seems to cause the problem ( I think) What can I do?