I had this consistent issue of regular but short periods that is only 2 day period.My doctor suggested CBC and Thyroid test and all the reports are excellent.She also asked to go for pelvic ultrasound which showed mild symptoms of Pcom.She gave me this tablet Krimson 35 to take for 21 days and then my period will come .Just want to know when will my period actually come and she also said the ultrasound is normal and nothing to worry about.