Pregnancy

Darien
So, I have a rather strange question... my period has been MIA for about a week now.. took two pregancy tests and both were negative.. where it gets strange is my two year old daughter... she has had this baby doll for about a year and a half and she doesn't play with it ever.. the past 3 days she has been carrying it around and making me hold it and cuddle it. Super strange. So I guess my question is am I just crazy or could this be a sign I'm pregnant since children seem to just know??