Answer: The best thing to do it talk to them and tell them that it would be okay. Also you can keep there mind off of it like watching movies, Playing board games, and also taking a deep breath outside and seeing how beautiful life is. Then when its the time for the event it would be more calming. ;)
About 83.3 ml of blood are pumped each hour
1) Talk to someone. 2) Avoid caffeine, alcohol, or nicotine 3) Exercise 4) Keep a journal where you pour all your feelings out 5) Get more sleep. Hope this helps!