I had an argument with my boyfriend and went to lie down but was still very upset about it, all of a sudden, I started to feel some shortness of breath (not a lot)... my heart also started beating louder and I would feel my heart drop ... my heart beat was regular other than those episodes where I felt like my heart dropped in its chest. Everytime I managed to think of something else, I wouldn t experience this, when I got nervous about my heart, I started having this symptoms all over again... Has anyone experienced this ? Should I be worried ? I am planning on seeing my doctor, I ve never experienced something like this and it has gone away.