Can you still be pregnant without implantation bleeding?

Amber

I’m curious to know if you NEED to have some sort of spotting in order to have implantation. I’m 8 DPIUI and have not had any bleeding and am getting discouraged that I missed the window of implantation bleeding. But was hoping that even if I don’t spot at all, it’s still possible to be pregnant? Has anyone had no bleeding at all and had a healthy pregnancy?