Hi there,I have understood your concern. I will suggest you the best possible treatment options . 1 ) First of all do not panic. 2 ) Your symptoms can be related to pregnancy only if there is some kind of positive pregnancy indicator. 3 ) As you are not aware of the cycle date., I will suggest you to wait for 15 to 20 days after the day of unprotected sex act. You can check for beta HCG in the urine or blood. USG if needed will be helpful. 4 ) with negative pregnancy test results, your symptoms can be related to PMS - premenstrual syndrome. In that case, I will suggest to opt for a healthy diet and regular exercise regimen. Avoid deep fried foods, bakery products and refined sugars. Use of long acting form of Vitamin B 6, vitamin E and evening primrose oil supplements on daily basis at least for next 3 months will be of help. 5 ) Even if you are pregnant , you can opt to continue the pregnancy or you can opt for termination of the pregnancy with medicines safely till 9 weeks of pregnancy under medical supervision. I hope this answer helps you. Thanks. Dr. Purushottam Neurgaonkar