Early positives.

Savannah

This will be our fourth child, but we have been trying for 1 1/2 years. I had one chemical pregnancy July 2019, but nothing since then! My tests were never this dark this early. I am still 4 days from when AF was supposed to come (February 7th or 8th). Top is from last night and bottom this morning. Should I be concerned that the bottom one is lighter?