Could I be or something else

Jacqui

So I am now late for my periods by 9 days I have taken several tests which are all negative but I am never this late. My periods are always regular which I track with this app. When I was pregnant with my twin girls I was 10 weeks before a test said positive and it was a certain kind that I can't afford just now as I am waiting to get paid. Should I just wait a little longer or should I get advice from my gp my head is going round in circles and I just don't know what to do 😔