niggly gallbladder

Im having problems,it all started 5 yrs ago when i remember being at the gym and having pains shooting up my back and pains in my right side under my rib.since that time they have niggled on,and even through my son being born 3yrs ago they niggled me, my doc says stress. but last yr i started throwing up,yellow diarrhea for months 2 stone weight loss,swollen stomach,i have had all tests done bar a hida scan,all were normal,from colonoscopy to stomach biopsies,liver bloods all normal and a ct scan showed no stones or anything wrong.Ive battled on,now im 1 yr on with severe right side aching which shoots up my back,i cant eat fatty foods at all,im just in so much pain,sometimes allsorts go through your head,have i got cancer etc,docs just say oh keep taking the pain killers,im due to see another gi specialist on dec 20th.All this is depressing me as i have small children and can barely bath them im in so much pain somedays.I have a family that has all had their gallbladders out all 8 of my aunts and sisters have had gallbladder disease but no stones,doctors wont listen to me.any advice is welcome.thankyou for reading.I dont drink or smoke just in case anyone asks.