My last menstrual cycle is december 2, 2016 - deccember 6, 2016. i had sex with my boyfriend last december 19, 2016. i had much discharge the day after that and it lasted for almost a week. i should have my period last december 31, 2016 but it is clear. we again have sex last january 2, 2017 and until now, i still don't have my period. i think it might be stress on work because I've been travelling a lot since last week of november (i spend 5 hours a day travelling back and forth for work) and i have stress on my deadlines and clients on work. and now this delay period is giving me stress. please help me. i don't know what to do.