I need anyone help..I missed my period and been having tingling and breast tenderness,extremely exhausted (just by coming out of bed I am tired),frequent urination,my innie  is now a outtie,craving,nausea,lower abdominal pain,light cramping...basically all pregnancy symptoms but I took a pregnancy test and it was negative...what could this be?? Could it be too early, or what...LMP-was February 21.