4 BFN’s

So I am now 5 days late. I have taken 3 tests all negative. I went to the docs today who did a further test negative which I knew it would be. I have no real pregnancy signs nor any AF signs . I have been like clockwork for a good few months now and unusual to be 5 days late. The only advice GP gave me was to wait 3 weeks if still no AF take another test if BFN the to go back and see them. I’m so gutted and these next few weeks I’m gonna worry even more 🙁