For the past 6 weeks I've had lower back and abdominal pain.. At first the doctors thought it could be a UTI, but the tests came back negative. I've had both blood and bacteria in my urine tests but they said it wasn't a uti.. I finished the antibiotics I received.. but the pain never stopped. I have extreme flank pain/tenderness.. sometimes the pain travels up to my shoulders..and my left abdomen is tender. Every time I eat I get extremely nauseous and I can only eat a little bit because I feel so full/ bloated. I have lost weight.. I have diarrhea and extreme heartburn. I've had shortness of breath and i feel like i can't get enough air. I've been to the ER twice but everything has been normal.. the blood work was good. I had a cat scan and I have a swollen lymph node in my intestines but they acted like it wasn't a big deal. So needless to say, I've had plenty of tests, so whatever is causing this is still unknown..I just don't know what's wrong with me and I'm tired of feeling like c**p. I have been in tears countless times because of this. Does anyone think these symptoms sound familiar? Could I have something that normal tests could miss? I plan on going to more doctors.. I just want opinions. Please help.