I am just wondering whether this is normal and how I should deal with it.
DD1 is normally well behaved. As a toddler she had a few tantrums but nothing for at least a year. She started Reception yesterday and last night she came home and hit her sister. I told her off so she kicked DD2 in the face. Her sister is only 21 months so I took DD1 to her room and told her she could not come out until she was prepared to say sorry. She went ballistic: screaming, throwing herself against her bedroom door, shouting "I hate you, I NEED you" over and over. She would not say sorry, I calmly told her to do so many times and she just screamed and writhed. This went on for 45 minutes. It was a really terrible end to her first day.
Today she came home and over dinner I told her she was going to the dentist tomorrow. I had no idea this would be worrying for her. She immediately started screaming and threw herself on the floor and bit my leg. She didn't calm down for 30 mins.
I can't explain how out of character this is. Is it normal for school to have this affect on a four year old? And how should I handle it? I am normally very strict but she feels unstable and I am not sure that shutting her in her room while is hysterical is fair during such a time of change.