Hi there, I have gone through your question, and I think I have understood your concern. I will suggest you the best possible treatment options. 1 ) First of all do not panic. 2 ) As you have mentioned that you had unprotected sex act in the last 8 days of the cycle, then you need not worry about the pregnancy. As in a woman with regular cycles, day 10 to 20 of the cycle is the most fertile period of cycle. 3 ) If at all you miss your periods, beyond 15th of July then I will suggest you to get morning s first sample of urine tested for pregnancy. 4 ) If your pregnancy test is negative, then you can simply wait for the onset of periods or induce the periods with Tab Regestrone 5 mg twice a day for 5 days. Usually periods start within 3 to 10 days of finishing the tablets. 5 ) With negative test results, your other symptoms ccan be due to PMS - premenstrual syndrome. In that case, I will suggest you to take Tab B LONG F, PRIMOSA, Vitamin E 400 mg each one of them at night for 3 months. Indulge in A healthy diet and regular exercise. Include more portions of fruits, salads and vegetables in daily diet. Avoid deep fried foods, bakery products and refined sugars. 6 ) AAlso, your left sided pain can be due to some bowel problem. I will suggest you do take Tab Orni-O 2 times a day for 5 days and Cap Vibact DS once a day for ten days. 7 ) Even If pregnancy test is positive, you can opt for termination of pregnancy with medicines safely till 9 weeks of pregnancy, under medical supervision. I hope this answer helps you. Thanks. Dr. Purushottam Neurgaonkar.