Thanks for the query.
After stopping the usage of contraceptive
measures it will take sometime for regularization of the menstrual cycle and for resumption of the ovulation.
This time period will defer from person to person.
So you better consult gynecologist once and go for physical examination and ultrasound
If all findings are normal you can trace you ovulation with ovulation kit and plan unprotected intercourse
around that period which will increase the possibility of pregnancy