Well sounds like you are dehydrated and maybe having a little anxiety
attack. Being dehydrated can cause you to have low blood volume and can sometimes make you dizzy when you go from sitting to standing too quickly. Being dehydrated can also have you to have heart paplipations, especially under periods of stress
. I would say drink some nice relaxing decaf tea and do some light stretching to relax. If that tightness becomes pain and you are having difficulty breathing
, you start sweating or vomiting
, then get medical attention.