I got the wrong pregnancy test :(

gosh darn it! Tomorrow was supposed to be my big day, the day I finally get to see if I am pregnant. I ran out yesterday and picked up a first response test, this evening I went to pull it out and set it up to test in the morning and I realized it was the Normal FR test, not the 6 days sooner test! I tried running to Target before they closed but I was too late. the grocery store had it, but only the 3 pack for 19 bucks! no way I am paying that when I know at Target it was 13, and the 2 pack is 9 at Target. Gurr! Does anyone know how important is it that I use my first pee of the day to test with?