i dont know what else to do..??

okay so here’s the scoop:

when my daughter was born we were breastfeeding. well after a week of being home from the hospital she was screaming in horrible pain. being a first time mom i thought it was my breastmilk and something dealing with me. so i switched her to formula. we started with the Nestle Goodstart (we are on WIC and that is their contract formula) well she decided to puke that up every feeding, didnt want to feed but you could tell she was absolutely hungry cus she would eat hten cry, then try to eat again etc. well finally we gave up and went ot the ER, i told him i think she may have reflux… he laughed in my face and told me she had Colic. well to me, colic is a 5 letter word for I DONT KNOW. he sent me home and told me to deal with it. nice doctor, eh. okay so we switched her to alimentum. that went okay for a little while, alot better on her tummy. then the arching the back, screaming fits, vomiting, spitting flem etc all came back. so our pediatrican had us add Oatmeal to her formula… it wasokay for a bit. but it still wasnt doing the trick she was still crying in pain whenever she’d spit up. finally i threated the doctor if he doesnt want to believe me that she has relfux we’re finding a new doctor that cares about her well being. so he said we’re gonna skip over the Upper GI and go straight to zantac. so we did a very low dosage of that… didnt work, so i upped it. worked for a bit. then i guess since she was growing so was the acid in her belly, so she needed her dosage upped again. well finally the Zantac literally was not doing anything for her.. so we did the Upper GI. according to the specialist, she doesn’t have reflux because she wasnt spitting up at the exact moment he was taking the xray, and said we just need to change the formula. so then she was constipated beyond belief for hte next week. still spitting up like no other. so we tried switching the formula.. Pedi said to do Enfamil AR.. well that made her constipated .. tried Juice, Karo Syrup..nothign was working. so we switched the to Similac version, Sensitive… we were adding the cereal to it.. and still spitting up a bunch. then we went to the Sensitive RS (with the rice cereal already in it) same thing. well now he has us switching her YET AGAIN to Enfamil Lactofree…………! We’ve taken her off the zantac now for a few weeks, she’s not screaming in pain anymore when she vomits… but she’s only eating 3-4ounces every 4 hours and spitting up atleast half of each bottle. i really dont know what else to do. what else to try. someone said something about probiotics, i tried it for a few weeks.. havent seen a difference. i dont know what else to try to help her keep it down. she even spits up like this for her baby food.

any suggestions????