Hello Doctors, I am 28 yrs old, female, about 190lbs and 173cm tall. I had my last cycle around the 4th of August 2011. I had unprotected sex with my husband on two occassions- one on August 21st and again on August 23rd. On the 23rd however, I took the emergency contraceptive Postinor2. I have had no spotting, discharge or anything since then. I have been fine all along but for the past week, I have been feeling extremely tired, nauseas, experiencing daily heartburn and chestpains. Should I be worried about being pregnant? I have not taken a test yet out of fear since we already have two children and are not ready for another one. Thank you in adavnce for your advice.