After having miscarriage When should I tell work

April • mum to baby girl 💖💗🥰 born 01/05/19 💗☺️💋

I am 12 weeks now but don’t want tell work I still don’t feel safe 🤦🏽‍♀️🤷🏽‍♀️ like I just don’t think can deal with work knowing just yet I don’t know maybe it’s fear ?? When did everyone tell work ? I work as receptionist so I sit down all day