anxiety
"Had a major panic attack back in January - never had one before (no family history) - horrific feeling. Had to be taken by an ambulance to local ER. Doctor there gave me prescription for 15 5mg pills in case anxiety came back. One day sitting at my desk I started feeling 'lightheaded' and knew something wasn't right. An anxiety was starting to build - your body automatically starts to scan itself for any problems. Took one pill and 30 mins later I was back to normal - my mind wasn't racing anymore. Lorazepam works great for me. I always carry  with me anywhere I go - just in case."