I see a positive, but how good are these blue dye test?

Nelly

I picked this test at my local General dollar store and they only had this test, are they reliable? The brand is called Rexall. I live in a really small town and the nearest Walmart, Target, Walgreens, ect. is about 30 minutes away, so for now I had to go with these. I was supposed to start AF yesterday, sometimes I can be a day or two late, but I just couldn’t wait to test.