Pregnancy test question- help!

Two days ago on Xmas <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>, my wondfo test strip had a pretty solid line, yesterday and today they were more faint. My digital tests still say negative. Could it be possible I am having a chemical pregnancy since the lines are getting lighter each day? Today is day 12 dpo. I have had 2 chemical pregnancies before

In the photo below, two days ago is the very left, yesterday is the middle and today is on the right