Suggest Treatment For Missed Periods, Weakness And Vomit Sensation

Hi I am 25 years old and married 5 months before. Not getting periods last date was 25 sep2010 from last 2 days feeling like vomet and giddiness as well weekness. By profession I am software engineer and in my personal life there is lot of stress. What all this symptom is?? should I consult to any gynecologist??