Pale yellow stools for the past 3 weeks despite what I have ate. Been keeping to a bland diet & Blood work normal and PCP don't think it's gallbladder?

Change in stool colo. If it is not bothering and blood works including liver functions are normal nothing need to worry about. If the urine color becomes dark or skin and eyes becomes yellowish, get an ultrasound of the liver and gallbladder area to rule out obstruction to the bile flow.