yes, it is extremely safe! Complications are rare and few. The earlier you are in your pregnancy, the safer it is. See the chart below that displays the timing for taking the pills, and the frequency of inconveniences and complications.
The abortion pill can be taken up to 70 days from your last menstrual period. Usually you would not suspect that you are pregnant until you were 1-2 weeks late for your period which would mean that you are usually at least 35 days from your last normal menstrual period (LNMP) and probably more.
If you want to terminate your pregnancy, call the office closest to you and make an appointment to be evaluated. The pregnancy test is free.