Walmart tests

Jessi • I`m a teacher and proud step mommy. My sons are five and six. Ready to add a little one (girl hopefully!)
I got two of the equate  Walmart tests. Both blue dye which I didn't realize. Any thoughts on these tests? Says five days on the box but then the instructions says four days. Took one too early then took one today and nothing. I have a feeling this month which I haven't had before.