I am having nausea symptoms randomly. It hasn't happened for the last 2-3 weeks but prior to that about 2 x a week for 2 - 3 weeks. I thought my medication I was taking at night might be causing it so I started taking it in the morning. When it happened before it was always in the middle of the night and would wake me up. My mouth would fill with saliva, I felt like I was going to vomit but I just sat up in bed and kept swallowing and it passed in about 30 seconds. Today I was just walking my dog and it happened. This is the first time it has happened when I was awake.