For the ones that are following me my last pregnancy was a chemical pregnancy. I never experienced…

For the ones that are following me my last pregnancy was a chemical pregnancy. I never experienced this so it was weird. But I knew something was wrong because lines weren’t getting darker on stable. The I got my period a week later. So weird to me I’ve been experienced this. My question is I got results back from progesterone but it says the value is (tnp) does anyone know what that means ? I emailed my doctor to see if they could explain it to me but haven’t gotten a response as yet. Just wondering if anyone experience this and what does this tnp mean ?