Pregmate Tests

How do you all feel about pregmate’s pregnancy test strips? Are they accurate? I’m currently 15 dpo and no period yet. I have a 30 day cycle and when I use the pregmate tests, they are consistently negative. Like stark white. I’ve been having pregnancy symptoms including extreme fatigue and nausea. I’m going to try a different brand later today but I wanted to gauge other opinions. TIA 🥰