Hello dear I understand your concern If you are sure about the protected sex then pregnancy is not possible. In protected sex, sperm can not enter in to the vagina so no fertilization will occur. To become pregnant, unprotected penetrative sexual intercourse in the unsafe period of cycle is required. Pregnancy depend on also which method of contraception you have used. Each contraception has some failure rate. So I would suggest to wait for the period to come. If period will not come in next 7-8 days then go for urine pregnancy test to confirm the pregnancy. Period can be delayed by hormonal imbalance, change in life style and dietary habit. Meanwhile avoid stress, take healthy diet, drink plenty of water and do regular exercise Hope this may help you Best regards Dr. Sagar