<s>[INST] I have a general "ill" feeling with a mild pain in my left chest along with a "bubbly" sensation that keeps occuring. CHest has been off and on for almost a week now, and can get worse at times.  Pulse is normal, BP is 128/87 I am 38 years old and otherwise pretty healty.  NO fever but chills... [/INST] Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you are mostly having HERD (gastroesophageal reflux disease). But better to rule out heart diseases because you are having left sided chest complaints. So get done ECG and 2d echo. If both are normal then no need to worry about heart diseases. HERD is due to laxity of gastroesophageal sphincter. Because of this the acid of the stomach tends to come up in the esophagus and cause the symptoms of chest pain, bubbly sensation etc. So take proton pump inhibitors and prokinetic Chat Doctor.  Avoid hot and spicy food. Avoid junk food. Avoid stress and tension if you have these. Don't worry, you will be alright. But first rule out heart diseases. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>