i had my last period on 16th jan.the next was due on 12 th feb.On the 6th of Feb, i had unprotected sex with my husband.we hav just been married in Dec 2010. we are not planning on having children for the next few yrs. i have not got my period for this month,which was due on 12th feb,as mentioned earlier.we both are extremely new to all and any of this...please bear up with the ignorance! But we need help. why am i missing my period.i did not take any contraceptive pill,i am apprehensive of the side effects.What do i do ?