So i had sex on feb.17 i had a period for march and a period for april, now i check my period calendar and there is no period and it claims that i am late. i have in the past missed my period for a month but i wasnt sexually active what does this me?

Some thoughts...: It can be hard to tell if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A home urine pregnancy test gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. For a teen, her pediatrician or an Ob-Gyn doctor can evaluate any persistent or worrisome symptoms.