Hi, Dr Purushottam Neurgaonkar here. I welcome you to HCM VIRTUAL CLINIC. I have gone through your question, and I think I have understood your concern. I will suggest you the best possible treatment options.
As you said you had unprotected sex, and the days of sex activity were during day 10 to 20 of the cycle; it is the most fertile period of cycle. There are chances of getting pregnant even if your partner has not ejaculated inside. As you must be aware that pre ejaculation secretion does contain sperms.
Taking
emergency contraceptive pill like
plan B within 72 hours of unprotected sex act helps to protect from getting pregnant.
But since now you are expecting your periods, the option is to wait for your expected date. Please get mornings first sample of urine tested for
pregnancy, if you cross your dates.
Even if you are pregnant, you can opt for termination of pregnancy with medicines safely till 9 weeks of the pregnancy.
I hope this answer helps you. Thanks
Dr Purushottam Neurgaonkar