Thanks for the query.
There is very less possibility for pregnancy
in your case.
You used regular contraceptive
pills for two months after the intercourse.
You didn't have intercourse after stopping the pills.
The delay in your periods could be due to irregularity as a result of stopping the pills.
So you can consult your doctor and take hormonal
pills for withdrawal bleeding and then after getting your periods you can continue oc pills regularly.