Hello As gallbladder removed so fatty substance will digest with very difficulty so they will develop hyper acidity and so also pain. It will take at least 1-2 years so collateral circulation for digestion ( enzyme secretion). In your case following measures may help you . do as . Try raising the head of your bed about 4 inches with blocks. It also might help to avoid eating or drinking for 2 hours before you lie down. To help control stomach acid one should not drink alcohol or drinks with caffeine in them or eat chocolates or greasy or spicy foods. Take some antacid ( if it contains oxetacaine it is good ) but iof symptoms are sever as pain in between breast you may need drugs like pntaloc- D once or twice in day. Sometimes over eating may cause such type of pain so try to avoid . Tension is the another cause of such pain. Hope this information will help you.