It sounds most like a generalized anxiety disorder but there could also be some OCD in there.
Answer:
Fight-or-flight, during this reaction, certain hormones like adrenalin and cortisol are released, speeding the heart rate, slowing digestion, shunting blood flow to major muscle groups, and changing various other autonomic nervous functions, giving the body a burst of energy and strength.
•lowers your blood pressure
•stronger bones and muscles
•lowers your chances of having a heart attack
•helps block negative thoughts
•you have better sleep
Hope this helps:)
The last answer would be physical changes to the body
My personal, tentative wild guess is: <em>apnea</em>
