Do you keep track of your basal body temperature? I'd be curious to see what that is showing at this point. If your temps are still elevated that would indicate you are pregnant.
Either way, do a pregnancy test again and see what it says...if still negative, call your OB/GYN just to maybe find out what might be going on. I'm sure it isn't anything serious, but if you are ttc, a delayed period can be confusing!!!
Do you have any health problems? Thyroid disease for example? That can delay a period.
Also, as a side note, I get ovarian cysts that grow and bust very regularly and those cause me pain, but they are not serious and do not mess up my period (although they sometimes can). So my initial thought would not be that you have a cyst.
at 12:52 PM on Dec. 17, 2008