I have been using the Confirm brand. I find them very sensitive. I usually always see a feint test line with them. Around "O" time tend to get a day or so when the test line is the same darkness as the control line within the 5 mins and then a couple of days where the test line is a lot darker than the control line within the first minute of the test. Then I drop back to a day or so of the test line being the same colour as the control within 5 mins. All up about 7 days with a positive reading.ow this is only because this brand is so sensitive. I have used another brand at the same time and I only get a couple of positive days which is the norm.
I have fallen pregnant while using Confirm.

Hope this makes sense and best of luck to you.
Debbie