Undetermined?!?!

Brittni
Has anyone had a positive pregnancy test after being 4 days late, then got blood work down, and been told my result was undetermined? That they just barely detected the hormone levels in my blood stream? And know what this means? She said I could be having a missed miscarraige. Cuz that late from period should have decent levels. Or that I ovulated late and super super early. Any experience in this??