Suggest Remedies For Delayed Periods After Discontinuing Birth Control

hi, i stopped my pill last friday but still havent had my period, usually when i stop it my period would come 3-4 days later, i spotted a bit yesterday but that was it. I have been on microgynon 30 for a few years and i have always been regular with no issues. I have taken a pregnancy test and it was negative, can you advise? Do i start my pill again or what do i do? thank you