Ok I know this is probably silly before I even ask it but I have to ask or it will nag me all evening.
So I walked home from work quite fast, 10-15 minute walk with a fairly heavy bag on my back. The walk was fine, I walked fast and never felt out of breath or dizzy. So in my moment of confidence I decided I would walk up the stairs to my apartment instead of taking the lift. My apartment is on the 5th floor.
By the time I hit the 2nd floor I could feel my heart beat increasing, by the 3rd it was beating quite fast and I started to feel really anxious that I was going to have a heart attack and die in the stairway that no one ever uses. On my way to the 4th I could feel my heart beat thumping in my throat, my chest and even my stomach. I checked my pulse on my neck only for a second and my heart was beating so damn fast, I felt three heart beats and I couldnt check anymore it was making me too nervous and feeling sick. I made it to the 4th and chickened out and got the lift the final floor. Standing in the lift I was afraid that this was it, I was going to have a heart attack. Soon as I got into my apartment I rang someone just to have someone to talk to to take my mind off it.
Sure enough my heart rate started to slow down within minutes, I cant say how long because seconds felt like hours. I guess I just want reassurance that all this is normal? I mean your heart rate has to increase to supply blood to the muscles being exerted but I worry my heart was beating too fast. Is that even possible? That your heart rate can increase so much while you are exercising it just gives out? Have I anything to worry about here?