How accurate are these tests? Could this be real?

Kelli

First month tracking and temping and I got my BFP this morning!! AF is due tomorrow/Saturday and I’m pretty regular.

Are these types of tests accurate? I also had a 1st Response and that didn’t show a positive but the screen was all jacked up. I’m getting a new box today and testing with both kinds throughout the weekend. I don’t want to get too excited too early you know?? Advice?