Very dark/strong positive test results

Miya • I`m a 39 year old mother of 3 beautiful son`s. I have been ttc for over 2 months now & hopefully with the help of Glow we`ll be able to catch an egg very soon. ( I was able to conceive my 4yr old with the help of this app in just 2 cycles YAY 🎉🎊)! So hop

Is it normal to get a strong/dark positive test line 3 days before missed period