Yes get a urine pregnancy test done once you are overdue by atleast 2 to 3 days . It can be done in the lab or else with a kit easily available off the shelf in most chemist shops and has very clear instructions on it. If pregnant and you are extremely sure of not continuing with it then you can go about doing the abortion with medicines or surgically. And whatever be the case please use better precautions as in contraception from now on as abortions are not good for you and your subsequent pregnancies.