6 days late but my HPT won't get darker!

Christina • Sat, May 20 • 🇫🇷❤️👧🏻🤰🏻 Ma vie est magnifique.

I am 6 days late today but my tests don't show more than a faint line 😢 it just won't get darker. My boobs are sore and I'm feeling tired but no spotting or period signs. Should I call my doctor? Thank you! I usually always have regular periods.