What to do..

My period is 9 days late. I just took a test and it was negative. I really wanted to believe there was a faint line but every time I took a picture of it, the picture didn’t capture the line so I’m convinced it’s just my head convincing me of things.

Regardless - 9 days late is quite a while to be late with no signs of my period coming.. is this something worth visiting the doctor for? My period has always been regular.