I Was Sitting On A Chair For 2 Hours And

I was sitting on a chair for 2 hours and had just finished lunch when I felt uneasy. took the lift to my hotel room and measured my heartbeat on my samsung phone. Its came out 110. (my normal is 61-65). I took rest for a while and checked again it came down to 75. checked again it was 90 then now it is 83. When it was 110 I could feel my hands tremble.. I drink coffee everyday in the morning.