Indeed it can be. I�d recommend that you speak with your GP. You could be encountering degrees of gastroenteritis, or if you have a problem with reflux- the experience of bile coming back into your throat, especially when you lie down, you could be having challenges with your duodenum. There are also additional matters at hand which could have to do with your heart. Through all of these there are remedies, starting with Gaviscon, and increasing to prescription items such as renetidine or omeprozole. As a temporary measure, try using some Pepcid Tablets or Gaviscon. But only whilst you�re waiting to see your GP.
I wish you well
Fr Bill