I have had this happen with Discover one step - and it was awful... Big hugs my love.
I hope that you get that BFP soon...

Just want to add - a chemical pregnancy is not when the fertilised egg doesn't implant. A woman's body will not produce HCG unless the fertilised egg has implanted. A chemical pregnancy is when the pregnancy does not develop properly - and it is a very early loss usually prior to 6 ish weeks. Just wanted to clarify that...