HI doc, I need an expert advise from you, I m 31 yrs old mom, but just a few months back i encountered a 2 months delay on my period. I supposed to have my period last 28th of January. I went for an annual vacation last December 27 and the day after I got my monthly period. My husband left in the place where we work so in almost 1 month we don t have any contact at all. Then I return back on the 20th of January 2013, and 22nd we had intercourse knowing that I m safe we didn t use a contraceptive , before that I noticed spot on my pad so I tought my period has to come. But till to date i don t have a period. I did pregnancy test and then for the 3rd time it was negative. My latest test was last 10th of this month and still negative.I m about to see a doctor because I M WORRIED of my health. Is there any reason why is this happening to me? what will be the probable cause? Please enlighten me..