Actually i had periods on 17 jan n i had intercouse on 22nd jan...then due to acne problems...the docror has prescribed some anti biotics medicines which i have started from 9th feb...he told me to eat the tablet thrice a week and for three weeks...then again had intercouse on 11th...n i was expecting my period on 15 bt till now it dodnt came...i have also done pregnancy test on 23rd but it was 100% negative...bt till not i have not gao periods...from last4-5 days i m feeling like periods and there is some white discharge also...so wgat might the reason behind it???