Hi i didn't see my period for december now i'm seeing light menstruation. could i be pregnant, is it a health risk?

Hard to guess...: It can be hard to guess if a woman is pregnant because some of the symptoms seen in early pregnancy can also happen in non-pregnant women. A urine pregnancy test gives a reliable result if done correctly. One can test about 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. An Ob-Gyn doctor can evaluate any persistent or recurrent symptoms.