help late by 5 days

so today is my 5th day of missing my period I done a test saturday and it came back negative I did do it pretty late in the day and I had just drunk a huge can of energy drink I came of microgynon over 2 months ago had my withdrawal then had my first period exactly when I thought I would which was 21 days after, so now I don't know if o should wait a few more days possibly till the end of the week to do another test was wondering if anybody would be able to give a little advice or suggestions