I have persistent nausea for over a month now. I have taken pantoprazole, rabeprazole, domperidone, mosapride and all of their combinations. Doctors have also prescribed me different anti depressants. It feels better when I lie down in a 45 degree position. Can anxiety, stress or depression cause persistent nausea that doesn't go at all? There is no such stress in my life. I have undergone a full body checkup and all blood reports are negative. Please help I have been feeling nauseous whole day for over a month now.