Not a lot of progression

Emily

Got my first faint positive on Thursday 9.21 which was 12dpo and 2 days before AF. So now I’m a day late and 15dpo. Should these tests be darker by now? I had a really clear positive at 10dpo with my first and it was a dye stealer by this point!

Feel really nervous and frustrated that they’re still so faint! Please help!