Yes, u could have heartburn without any other symptom. When u have anxiety like I experienced I also had fast heart rate, very nervous, felt like passing out, fast heart beats. All these symtoms can go away. Don't be nervous. Go see your doctor. tell him about these symptoms and let him prescribe a anti-anxiety pill. I was on ativan, took it every nite, help me to get to sleep and felt so much better during the day. If you are having heartburn, this too might be alievated with meds and you need to watch your diet. I'm on a very plain diet and still have heartburn, sometimes it's just nerves.