well like the other person said if you used protection and or condom then you should be fine Me I am going to be 20 and I am almost 9 months pregnate and I got pregnate on birthcontroll.so if I were you i would wait another week and if still no menstral then go to planned parent hood,Good luck and i hope thing go your way and keep us posted.thanks for listining
if you used protection or are on birth control then you should have no problems but otherwise it may be to early to test. If you dont get your period by the end of the week or a week after it is due then test again. If you get it then no worries...keep us posted and good luck :)