** Thanks for contacting with your health concern 1. since there is a delay in periods with usual signs of premenstrual tension absent thus check with home pregnancy test [HPT], for positive signs of pregnancy, also it could be due to certain lifestyle changes were done recently [if any] like: - excessive stress - loosing or putting too much of weight [present] - heavy exercises - suffering from PCOD [polycystic ovarian disease] or having a high level of prolactin [hormone] 2. If UPT comes negative for pregnancy, it is best to seek suggestion to know why you have missed your periods, a Gynecologist would be ideal to consult, for appropriate examination/investigations