I have an unplanned pregnancy, can I abort the fetus?

Salam alaikum,
I am married and have one daughter who is 15 months. I discovered an unplanned pregnancy, i am in (20 days counting from today 18/3/2013).I am studying for master, working at the same time , I've just finished curing anemia (I am 50 KG). Since the coming of my first baby I have neglected myself, my husband and my daughter is taken care by another woman because of my work.

Can I take pills to get this pregnancy away.
Thanks for your consideration.