racing heartbeat
• difficulty breathing, feeling as though you "can't get enough air"
• terror that is almost paralyzing
• dizziness, lightheadedness or nausea
• trembling, sweating, shaking
• choking, chest pains
• hot flashes, or sudden chills
• tingling in fingers or toes ("pins and needles")
• fear that you're going to go crazy or are about to die