Welcome to healthcare magic.
You have sterted oral contraceptive pill on right time.
If you had sex on 25th July you have no chance of getting pregnant as your oral contraception is on and will offer its protection.
You donot need i pill as emergency contraception as pregnancy
chances are not there due to contraception.
Giving contraception is the main purpose of oral contraceptive pills
. Hence dont worry about pregnancy while you are on dronis
I hope that clarifies your doubt.