Hi my wife did IUI some two weeks back, she was put on 14 days Duphaston. Her 28th day was two days ago. She did home preg test on the 28 day but it came negative. yesterday a day after the 28 she had serious diarrhea and vomiting. She hasn't seen her menses until today. My questions: Did we test too early? Is her failure to menstruate due to duphaston? what could be the cause of vomiting and diarrhea?