Thank you everyone for your advice and concern. I had a restless night. Finally it dawned on me to sip carbonated tonic water and basically sleep upright for the heart burn. While I value everyone's input, I think the main purpose of the fast is to listen and be gentle with my body. If my heart burn is severe enough, I will break my fast. But for now my body tells me it is not ready yet. All I can say is what a journey. Different issue everyday and you never know what is around the corner. I am just glad I'm not on this journey alone. So I'm not sweating the small stuff, because the rest is sure to follow.