Not to upset you but to try and keep your hopes grounded..... I am in the same situation with you and dan-o. I get those on both CB and IC nearly every month. I don't think it's naturally high HGC though, I think they are chemicals although I have -of course- no proof and MF to deal with so please, because I know just what it feels like be gentle to your heart and try to take it in stride till you do the digi.
With that said I HOPE TO GOD you get to see "Pregnant" and it sticks, it would give us all hope!