Hello dear Understand your concern Chance of pregnancy is very less as you are using abortion pill and condoms. Delayed period for two days not confirmatory sign of pregnancy. If period will delayed by 10 days, you can confirm the pregnancy by blood HCG/USG scan as it is more accurate than pregnancy kit method. Back pains, a headache, and some abdominal cramping may be a premenstrual symptoms or hormonal imbalance that lead to delayed in period. Take rest, analgesic, start stretching and walking exercise, take fruits like papaya and orange, avoid stress. Hope this may help you Best regards Dr. Sagar