Hi, I am a 17 year old boy who was normal. One day I took a panic attack (I think), ever since every single bit of exercise results in high heart rates. Just getting up out of bed it rises to at least 120-140 and when I even try to run it goes to about 160-180 easily within seconds. I have been to a cardiologist and he said that my heart is completly fine and all the tests I had came up normal with my heart. Would anyone be able to help me please, I am running out of options.