paano po ba malalaman kung sino ang naka buntis sakin?1st naka sex ko feb 27 and 2nd march 5

Based on the information you provided, it seems likely that the pregnancy resulted from the sexual encounter on February 27th, as that would align more closely with your 6 weeks and 5 days gestation at your April 13th check-up. However, for precise confirmation and any further medical advice, consulting with a healthcare professional would be the best course of action.