Should I stop going to church and being a christian?

ok,few years ago,I went to a certain church "deliverence service".This service is all about casting out demons like spirit of fear,spirit of death,spirit of suicide,spirit of cancer and diseases.The leader prayed for those people who has thoughts of suicide,death and fear and etc,then those people scream unreasonably,fell on the floor and start vomitting.I was tramautise after attending the service.Sometimes I do have a nightmare that people vomit on the floor.