Hello dear thanks for trusting health care magic.
Chances of pregnancy
are nil because of the fact that you had periods on 9th July and sex immediately after periods is not going to make you pregnant.
Just wait for your periods and see if you get them odn time.
In case you do then switch to a regular method of contraception
But in case you miss them visit your gynecologist.
In case you have other questions you can contact me directly on http://bit.ly/drmanishajain