Yes. You should assume you are pregnant. The exact color of the lines is not important.
Though a positive result should not change for several days, a negative result may change to a false positive within minutes after the end of the testing period, which would not be an accurate reading. It is always best to read the results at the 5 minute testing period and then discard the test to avoid confusion.
Related blog articles:
Pregmate Pregnancy Tests. How and when to do the test? 
Conception explained. Fertilization and Implantation.
Pregmate App - Ovulation Tracker, Fertility and Period Calculator
What factors can give false positive results?
What if the testing line is very light in color, am I pregnant?
What are pregnancy test evaporation lines?
Fertility drugs and pregnancy testing
When to collect urine for the pregnancy test?
Reading pregnancy test results
3 comments
My wife had one positive test the first test then two negative and I’m not sure why any advice
Experience the adrenaline-fueled excitement of Turbo Moto Racer as you commandeer a selection of high-powered motorcycles through stunning landscapes. Navigate dynamic highways, skillfully dodging obstacles that stand between you and victory. Immerse yourself in the thrill of the ride and conquer the road with style in this heart-pounding racing adventure! https://turbomotoracer.gitlab.io/
Thks for u help and advice