Hi Doctor, My friend and her girlfriend indulged in protected sex 2 weeks ago. My friend is 110% sure that, nothing was released inside. Her gf's periods also started normally, on the desired date. Its just that the flow is not as expected and little slow and also the pain which used to happen every time is less. His girlfriend recently got up from up from a heavy dancing routine and sickness. Doc prescribed her heavy dosage of antibiotics and other medicines and she also remained in work related tension few days back. Can you please tell the possible reason of this low period flow? And also, IF there's any possibility of this being related to pregnancy, what measure can be taken as they aren't planning it yet. Thanks.