Hi,
Have you tested again???
I have written a thread in BB about these tests. They have a problem with giving disappearing positives. Not all batches. Some women have used them without any problems but some women (ME!!!) have got a positve only to see it disappear minutes to hours later.
There is much on the internet re these tests and they are sold under different names. I can't remember the supermarket brand now that is the same test sold under a different name. It will be in the thread I wrote but I don't know how to give you the link.
Anyway my hope for you is by now you have a big fat dark line.
Let us know!
Hugs.