This may sound silly but.... ?

Mrs A ✨ β€’ Married & ready to start a family!! Baby #1 on its way πŸΌπŸ‘ΆπŸΎ Feb 2016 πŸ™πŸΎ
Where you're checking BBT where do you put the thermometer. I just bought 1 from the pound shop and weren't sure where it went ???