Thanks for the query.
it will take some time for regularisation of the cycles and for onset of ovulation.
So it is difficult to tell the possibility of pregnancy
Anyhow as you used protection there is less possibility of pregnancy.
You wait for one more week and if you do not get periods by that time go for pregnancy test once.
If the test comes negative, possibly you will get the periods soon.
If it comes positive, consult gynecologist and proceed according to her advice.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429