Can I be excited..?

I'm nervous because it's only day two of my first missed period.. I don't want to tell friends and family because then it becomes real. I'm terrified of a miscarriage. When would it be more safe to start telling people if this is real..?

We have been trying for over three years.. We are on the edge of our seats waiting for this bean to stick. Hubby says he doesn't want to get his hopes up yet, but it looks like a solid line to me!