Nadine, I have always had this when using the Confirm brand. I just think they are more sensitive. In the past I have used two different brands at the same time just to see. Confirm gave me 5 days in a row whereas Fortel I only got 2 or 3 days of positive. I have always stuck with Confirm and as you can see it has done the trick.

Just some extra info., I have always started to BD as soon as I got a positve and then every other day (or every day if you want) until a day after it goes back to negative again.

Hope this helps.
Debbie