Need Advice please!

Hello there! I'm new here and need some advice. I'm a 23 year old female and have been having serve stomach pains that usually sit right in the middle of my abdominal area. I've been slowly getting worse and worse with the pain. I've been going on just about 6 years with the pain and it never really moves away from the middle. It started with nausea back late 07 early 08.

my dr sent me to a GI and she did a an EGD and found GERD and gastritis they then put me on Acifex which worked for me and I stopped taking it.. I started getting the pain back about a year or so later so I went to the Dr again and they just gave me another perscription of Acifex which didn't work this time. I then went on Opemprozle and that started helping tremendously until it slowly didn't. I went to a new GI dr and he put me on pantoprozle and carafate but wouldn't send me for any more tests except for more blood work. I was tested for celiac three times and all times came back negative I went to see another GI dr who was supposed to be one of the bests since she's been in all these magazines and my cousins fiance works for her and ranted and raved about how fantastic she is. she sent me for another EGD which came back the same as the first time. I've also had several ultra sounds and all came back fine.

I went for a HIDA scan that showed my gallbladder fills up very slow but the surgeon saw no reason to take it out. the nurse preforming the test said it should only take about a half hour to fill...mine took about an hour to fill and all my GI Drs seem to ignore it because the actual function is right.

I'm now currently seeing another GI (because the last one said she could no longer help me.) and he just sent me for my first colonoscopy and found IBS-C and internal hemorrhoids which were grade 1. and told me he wants to put me on Linzess

I feel like the IBS-C could possibly be the reason why I'm having all these pains but something tells me it's still something linked to my gallbladder. my cousins fiance who works with GIs all day told me it's just my GERD and stress. Even when I'm completely stress free I can barely eat! I lost a total of 60 pounds..luckily I was able to gain back 10 of it because I forced myself to eat and bare through the pain because I looked so sick and skinny. my co-workers constantly tell me I look way too skinny for myself. I'm stuck where to go from here! I'm at a lost. I don't want to give up to find out what's wrong but I feel like noone else can help!