hello mam, thanks fr trusting HCM doctors fr ur health related queries. i guess ur concern is possible to get pregnant inspite of taking i pill within 48hours...right??? i got the picture.. my straight forward answer is-NO..NO.NO.. well mam lets discuss with the info u have given to us... took i pill within 48hours:correct method of taking it... wen a women takes i pill it alters the hormonal status in her..tis altered hormonal status is not favroble fr pregnancy...n it takes time to revert from altered hormonal status to normal status,,thereby delay in next month menses....tis delay will be usually 4-5 days,,,,but in ur case u have told its been a week.... n u havent shared whether ur periods are regularly happening every month... with these i cant say u are not 100% pregnant..but dont worry chances are less though... well with abv small discussion u can try out my suggestions:- 1.get urinary pregnancy test done.its available at ur medical stores at affordable prices..buy it n do it urself..if negative u r not pregnant,,if positive then u r pregnant.....tis is temporary relief fr u 2.i strongly recommend u to visit a nearby gynecologist to discuss the matter to doctor that u havent got periods till now.. y am i suggesting gynecologist is cz they have sound knowledge of anatomy of female body n how it normally n abnormally functions... if pregnacy is there doctor can help how to solve problem,,if pregnancy not there she can find what other causes may be present that is causing delay in menses,...tats dual advantage.. 3.next time use condoms...condom has result(u wont b pregnant)but no side effects...i pill has result(u wont b pregnant)but of course along with side effects i hope tis was informative enough,helpful,useful fr ur query.. regards-dr.sudha rani panagar. (having regular healthy sex life style btwen couples is very good and advisable too...but a small presence of mind,u can use condom n can make girl free of medicine side effect n boy from being in psychological tension whether his gf has become pregnant)