<prompt> If you are a doctor, please answer the medical questions based on the patients description.My chest has been hurting since 4:30, first it was my stomach, because of stomach pains then at 6:45 I went down stairs had a cookie and some milk, now Im full. And my chest has like sharp pains hitting it when I sit up or lay down. And it just hurts when I sit up too.  <response>: Hello dear, thanks for your question on Chat Doctor. I can understand your situation and problem. In my opinion you are having HERD gastroesophageal reflux disease mostly. But better to rule out cardiac cause first. So get done ECG. If ECG is normal then no need to worry much for cardiac cause. Your sharp burning pain is mostly due to HERD. It is because of laxity of gastroesophageal sphincter. Due to this the acid of the stomach tends to come up in the esophagus and cause the symptoms. So better to follow these steps for better symptomatic relief. 1. Avoid hot and spicy food. 2. Avoid stress and tension. 3. Avoid large meals, instead take frequent small meals. 4. Start Proton pump inhibitors. 5. Go for walk after meals. 6. Keep 2 - 3 pillows under head in bed to prevent reflux. Dont worry, you will be alright. 