line lighter than yesterday's?! advice please!

Danielle • 22 yrs old☉ Mama to a rainbow baby due August 4th, 2018🌈 Expecting my 1st baby❤

both are taken with FMU but the one I took today (13 dpo) is a tiny bit lighter than the one i took yesterday (12 dpo). please tell me I'm not going to have another chemical... I see the doctor today to confirm and hopefully the bloodwork comes back good! What do you think of these tests???

these are all my tests I took so the gradually for darker until 13 dpo which got a tiny bit lighter.