Hi, My Name Is Holly. My Sister Just Called Me

hi, my name is holly. my sister just called me crying and complaining of severe abdominal and leg pain. i'm a CNA, so i'm not in a position to give her a direct answer about it; but before she goes to the hospital or receives treatment, she wants to know if the two symptoms could be associated with an ectopic pregnancy. she has had unprotected sex while ovulating and is a week late with menstruation. although she took a home pregnancy test, and it came back negative, she is still concerned. she has had other symptoms such as fainting, nausea, and tender breasts. what do you suppose this could be?