Am I been unreasonable?

I'm due to get married soon, and all the planning has taken its toll. Haven't had much help at all. When asked by my bridesmaids whether I was having a Hen Do I said no, as unless someone else organised it, it wasn't happening as I'm fed up of organising things. One of my bridesmaids has since organised a hen do for someone else who gets married very close to our wedding, I'm feeling a little bit emotional about it all and a little annoyed. Am I being unreasonable, I feel like bridezilla is making an appearance?