Hello dear I understand your concern There is always some chance of pregnancy in the unprotected sexual intercourse. Following are the symptoms of pregnancy: most common: delayed period Variable: heaviness, white vaginal discharge, breast tenderness and enlargement and darkening of areola. For safer side you should take I pill as early as possible if you have sex in the fertile period of cycle (10th to 20th day of cycle). If period will delay by the 10-12 days then go for pregnancy confirmation y urine pregnancy kit. If pregnancy will detected then still you can terminate the pregnancy by abortion pill under the advise of gynecologist. Hope this may help you Contact HCM for further health issue Best regards Dr. Sagar