I think i precame inside her a lil bit so we stopped having sex (this all happened on Dec.1) and i rushed to the cvs and bought the Plan B One Step pill and i gave it to her about 30 min later. Now its Dec. 3 and shes experiencing a sore chest and is always feeling tired. She also said its painful. Does that mean the pill is taking affect of not getting her pregnant. She does weigh around 117 pounds. So Plan B would work on her since she isn't overweight.