hi i appreciate your concern Looking at your symptoms,it seems to be common case in 27 weeks of pregnancy because During pregnancy the growing size of the uterus puts pressure on the stomach and the hormones released during pregnancy relax the sphincter (a ring-like muscle that encircles the openings and passages of the body). This action slows down the digestion process and allows the acid to rise up the sphincter. This causes problems like, indigestion, heartburn, constipation, and gas, which, in turn, causes a burning sensation in the chest. i would advise you to take tab pantoprazole 40 mg with antacids for immediate relief avoid fried and junk food Hope i have answered your query thanks for using HCM good luck take care