Af 4 days late, but digital says negative!

Liza • 👦🏻 5/5/16 👼 8/13/18 🌈 👶🏻 12/15/19 👧 12/4/2019 (our 🌈 baby came early) 🤰with baby number 3

So, last night my first response gave me a vvvfl, this morning my digital says negative! I’m so confused, could I still be pregnant??