Greasy high fat food places a big demand on your gallbladder. If there isn't enough bile for digestion, your gallbladder will spasm to pump more bile for digestion. If you have gallstones, your gallbladder spasms but then plugs up. It becomes enlarged, inflamed and sometimes infected. Depending on the outcome of the scan, they could decided to remove your gallbladder. Its an outpatient procedure in some places these days with only three holes. It could be responsible for alot of your back pain. I would stick with less fat and more liquids until you hear from the doctor. That way, you won't make it worse. Every woman in my family including me has had their gallbladder removed. Good Luck.
One more thing to add. Is there any correlation that I cannot seem to get my Ferritin level higher than a 4 in the past 6 months? just wondering?