So confused, I took a few Tesco tests before my period was due and all came back very clear positive, I then tried a Poundland test and a very faint line showed up but definitely there. I was told to take a first response test which I did today since it is the day of my missed period however the test showed up negative? ( I took another Poundland one today and again a faint line appeared) but the first response has thrown me off completely.