Faint lines positive test

I tested positive one day after my missed period. But the lines are inconsistent and today it is slightly fainter than the day before. I am about 6 weeks in (as per app). Is it normal to see faint lines everyday after my missed period. In the pic, the day is referring to from my first day of test till today. Also, when is the best time to engage a obgyn? This is my first pregnancy. #firsttimemom #advicepls #Positive #faintline #ttc #singapore