I Take Norethisterone Pill Yesterday Evening But Some Bleeding Has

i take norethisterone pill yesterday evening but some bleeding has come in night i think that date had come but next day it is only few drops to yet i consult doctor she said i have to take this pill morning and evening to stop period and for two days if bleeding stop then i can take for 6-7 days if bleeding not stop then stop this medicine i have taken one tablet what i do know i am going for vacation tomorrow my last period date was 4 april and period come 5 days early