Hi i'm 29 years old. My husband and i had final decided to try to have a baby. The beginning of my last menstruation was on Jan 24, 2011. We had sex on the Feb 7 and i was due to have my period on the 21st of Feb. I have always had a normal period meaning i have never missed at all, I have all the symptoms of getting my period and still do.I am 4 days late now and i have took a pregnancy test and the results were negative. My question is should wait longer to take another test or could it all be a mental issue with my missed period?