Sorry you are going through this.
I had my gallbladder out it caused me horrible reflux, ulcers and pain and is no fun!! Its possible yours has given you a ulcer which can cause similiar pains, Stay on the reflux meds and avoid tomatoes, ketchup, pasta anything that irratates it, ( my surgeon told me if it tast good spit it out lol) this helped for a while. Its takes awhile to fully feel better once it is out too.. like 3- 6 months to re adjust your diet I still have horrible problems with Acid reflux :-(
However, to remove it they have to put you under which is a HUGE NO-NO during pregnancy and can pose a strong risk to your unborn baby.
I have 4 kidney stones right now all above 4-6MM of which need surgery to be removed but was advised by 3 dr that its a no-no unless i want to possible have my baby not survive being completly under that long..So Now we just hope they other stay in place as I have had to pass 2 !! and its excruiting..
Good Luck !!