3 Weeks Pregnant

Hello! I’m due for my period tomorrow (2/14) but I got a positive test on Saturday (2/8)! My first one I took was a digital because it was the only one I had and I really didn’t think it was going to be positive that early… but I’m so happy it was! Anyways, this is the test I took this morning and the test line has darkened over the past few days. I look at the test line in this picture and it just looks so dark to me! Is this a normal positive test the day before a missed period? I’m wondering if I’m possibly further along than I thought (I had a really weird cycle last month) or maybe even carrying more than one? What do you guys think!