3 times neg pregnancy test but no pms symptoms. took ellaone after unprotected sex. could it be the reason why no pms symptoms?

When was last mense?: EllaOne works to prevent or delay ovulation and has a progesterone like action. Some women will get early spotting or menses after taking the pill and others will have a delay in their menses. A pregnancy test is reliable about a week after menses are expected, sometimes earlier. You do not state when you did the hcg tests and when you expected to have pms symptoms.