Super dark

Tessa

This was my test at 9:30 pm on January 8th. I was 4 weeks and 6 days. I took this the day my period was supposed to come. I found out about my first around the same time but the line was much more faint. I'm not sure why but, it feels so odd to me that it is so dark. Any thoughts? Could I be further along than I originally thought?