I don t smoke , drink, drugs,caffine..etc. nothing like that. It s just when i m laying down and walking around(not running). sit down and stand up... My heartbeat is going over 120bmp. lowest one was 110bmp and highest one was 126bmp. i posted question about this but if anybody knows how to take care of this without seeing a doctor. please let me know. i take a blood test too. it wasn t anemia what s normal heartbeat rate? I am not overweight at all too I m also getting dizziness , back pain , chest pain ,left side headache,trouble breathing in the morning,dizziness i m 20 years old