question: Hello doctor, I feel pain in the epigastrium part of my stomach mostly when I sleep or lay down. It happens only when I lay down at night or daytime.I have heartburn, constipation, gas, bloating in my stomach and I think it may be acid reflux. The interesting part is that all of this happens while lying down. I go to pee very frequently, and this frequent urination becomes worse at sleep time. If I stand up, all of this disappear.