Have you ever been so frustrated?

Ok so my daughter was born a healthy 10.5 pounds and we all were so excited to finally have her. She dropped a pound before leaving the hospital 6 days later. She was put on formula due ot my health reasons after 2 weeks and has been since. She spit up a bit so she was put on soy. She still spits up and its getting out of hand! Its like at least 1/3 of her bottle and sometimes it seems like the whole thing. At her 3 month check up she weighed 13.3 with clothes. I have told her dr every check up and ive even called in to her nurse and seen the pediatrician but they all say shes fine. I feel in my bones something is wrong. Since she was born she sounds weezy and congested but they kept saying use the bugger ball, but she had NO buggers! I broke down today and called a bigger hospital in our area and the pediatrician sounded concerned and wants to see her before the week is up. I cant help but think what is wrong with her! I've heard acid reflux and gerd. I just want to know..its the not knowing! I just think the drs dont care-if something happens to my child i have to live my life with that they dont! Im so frustrated!!! I have been crying all day!! She has been crying alot lately and not sleeping a wink! We pulled a sliver out of her arm (not sure how she got it!!) but she is still fussy. She was colicky but was better at her 3 month mark. She'll be 4 months on saturday. Sorry so long im just really upset!! Has anyone had an incident like this? This dr will be our 3rd opinion!!! The peds dr at our hospital said she's fine but missed an ear infection on her!! I was so mad!!