Condom broke; could I be pregnant?

Patient: I had sex this morning and the condom broke. My last period started on August 20th and ended on August 26th. My partner did not ejaculate inside me. I am not currently taking the pill, however I have ordered the morning after pill (Levonelle) and it is due to arrive on Tuesday by 13:00, so within the 72 hour limit. How likely is it that I may be pregnant?

Symptoms: N/a