Pregnant after taking the morning after pill levonelle?

Hi, i found out 5 days ago i was pregnant with my 4th child. It wasnt a planned pregnancy as my husband was booked in for a vasectomy. I took the pill levonelle 1500 within 12 hours and im pregnant! I was told i would need to be checked now whether or not its an ectopic pregnancy. Is there anyone else in the same boat or have been through this? Would like to know how great the chance of it being ectopic it is? I am not having any abdominal pain or bleeding. Im about 4 weeks pregnant.