Hi,
After stopping the
contraceptive method, it will take some time for regularization of the
hormonal levels.
So, fluctuation in the menstrual cycles is common.
If you had
unprotected intercourse around the period of ovulation, there is possibility of
pregnancy.
But just by symptoms we cannot come to one conclusion regarding that.
So, consult gynecologist once and go for
ultrasound.
Ultrasound will help in finding out the possibility of pregnancy.
And in case of absence of pregnancy, it can help to find out the possible cause for delayed periods.
Then you can go for withdrawal bleeding with your doctor's advice.
In the next cycle, track your ovulation and plan intercourse around that period.
For more details : http://srsree.blogspot.com/2013/10/ovulation.html
This will increase the possibility of pregnancy.
Take care.