period 5 days late negative tests

Alex • Together for 4 years ❤ been trying for baby #1 since February 2018 👶 mummy to 1 furbaby 🐶

0k so period is officially 5 days late I took a test when it was 2 days late and it came back negative. I have cramps and a tiny tiny amount of feeling sick and a banging headache .. I have not missed a period in easily 4/5 years or longer. whenever my period has been late it has been maybe a couple of days no more. but it has been clockwork regular for months. what could be going on ????