<s>[INST] HI   Me and my gf had unprotected sex on 28th of Sept 2013 at around 12:15 PM. she was expecting the periods to come at 30 or around 2 or 3 , means today. She did the pregnancy test and it was negative,  YYYY@YYYY , she said that each month she gets period before 4-5 days than the expected date, She has not got the periods yet.  today is 3rd Sept, still not. Please help me with suitable solution for this. She is 22 years old . . . I need to help her in this situation.   Please help me.... [/INST] Hello,Unprotected sex just prior to period date is very much safe and there is no chance of pregnancy.She should wait at least one week to get period naturally. Otherwise, she can consult with her doctor to induce period with progesterone pill. Avoid mental stress and take healthy diet.Hope, it helps. Good luck. </s>