So I have a galaxy s6 and I have an app called so health that can tell you your heart rate with a sensor on the back. I had this crazy idea to put it on my tummy...we'll I did and it said I had a heart rate of 239 bpm...now I'm no expert but I'm pretty sure if I had that heart rate I would be having a heart attack. So I took mine with my finger and it read 83 bpm. Strange. Now I was wondering if it could be possible to have another heart beating (a baby) or what? It kinda freaked me out cause I stopped breathing just to take it so it could read it so there couldn't be any other movement cause I was still as a rock..any answers???