i suppose to start my period on April 27,2011 but nothing come down. but lately i had unprotected sex with my fiancee that was 2 weeks ago. and im having symptoms like getting very tired, sleeping at work, craving for ice cream around 2am, my boobs are sore, having mild cramps off and on and using the bathroom more often. i have a doctors appointment on may 18th. so i dont know what to do. but i took a pregnancy test it came out negative. what do you think? im 24 years old.