Confused

Jane • Alexis Agnes Jemma Flaws 💜🌏
I took two test today one with fmu and other not they both came back with a vvvfl but was to faint to say whither its was pink or grey just was strange as I take these tests all the time and have never had an indent and have never heard of an indent on two test taken not long after each other I always use the same tests AF due in 3 days. Opinions?