Does bleeding/periods after taking norethisterone acetate controlled released 15 mg for 5 days confirmed negative pregnancy? Before taking the medicine I have checked both urine test (3-4 times) and blood test (2 times) after missing my periods. 1st beta hcg blood test was taken on 6th day of missing periods and 2nd beta hcg blood test was taken on 16th day of missing periods. Both the times beta hcg was less than 2miu/ml. Also I got withdrawal bleeding after taking norethisterone acetate controlled released 15 mg for 5 days. Does this confirm 100% negative pregnancy? Will pregnant women bleed if this medicine is taken? Thank you for answering.