Dark line (pregnancy line)

China 👩🏽👦🏽👦🏽👦🏽👧🏾👼🏽🌈👶🏽 • Mommy of 7...

So I’m only 4w3d and today I notice that I have that dark line going up my stomach already. Never noticed it this soon with any other of my pregnancies. Is anyone else experiencing this this early???