When I was 32 weeks pregnant with baby number two I suffered horrendous tummy pains - seriously it was more painful than childbirth! After numerous tests and an ultrasound scan I was diagnosed with gallstones, which are apparently very common during or soon after pregnancy. As I was pregnant and on a maternity ward at the time the medical staff did not give me much information other than to try and avoid foods with more than 5% fat in.
I was unable to get my gallbladder removed due to being pregnant and there was no way I wanted to suffer that pain again (I had 4 attacks in a week). So I spent hours searching online to see what I could eat without trigging another gallstone attack. Honestly there wasn't very much information available and the information that was available was very contradictory.
I lived with gallstones for six months before I got my gallbladder removed, getting it removed was the best thing I did and 9 years later I have not suffered any complications or pain.
Over the six months that I lived with gallstones I worked out what I could eat without triggering an attack and what foods were safe to eat with gallstones and what foods to avoid.
The best advice I can give is to not eat any foods with more than 5% fat in them, check labels and avoid foods that you know will trigger a gallstone attack.