Hi I had a 12 week scan today. My fates were completely off. In certain the dates are wrong as I know the exact time I got pregnant and who with as there has only been one person in the last year. I counted I would be 13 weeks 4 days but they told me I was 15 weeks 5 days. I am completely devastated as now the partner thinks it isn't his. Is there anyway this is possible they have got it wrong as I'm so confused as to how this is happening. Any help or advice would be appreciated.