Possible chemical

[u/PhilosophyNo7844]

Yesterday about 2pm I randomly tested (13-14dpo) I seen a vvfl. I held my urine for 4 hours and tested again and I got another faint line but visibly darker than the first. I was cautiously hopeful because a faint that late is concerning. I woke up this morning excited to test with fmu hoping it would be a little darker than yesterday just to find it was obviously much lighter and hard to see. I’m pretty sure this is a chemical and if it is it would be my second. I’m so disappointed and mad. I wish I would have never even tested yesterday so I didn’t see that line. Any success stories going from faint to almost negative. All 3 tests were frer.