I am 20 years old and have never really been sick, not even the flu. I always thought I was very fortunate. Now they think I have an infection in my gall bladder. I had an ultrasound and blood work done but nothing irregular was detected. I am going to have an hida scan done Thursday morning. I was researching online and talking with one of my friends who has gone through this about what the test is. It seems pretty harmless until I read someone's post about it being painful. So I just thought I'd ask for any information that would be helpful. Thanks!