When to tell my daughter?

Hi, this is my 4th pregnancy. I have a 5 yr old daughter and two recent miscarriages last year. I feel she may suspect something and I feel bad keeping it from her but with with two miscarriages I’m worried if I tell her and something happens That would be hard for her. Currently 8 weeks and 4 days. I’m so excited yet the fear of loosing again is always on my mind. My ultrasound looked great with a strong heartbeat so keeping as much faith as I can 💜 thanks for listening!!