Ok im just looking to see if this had happened to anyone else.  I was ttc for a couple of months tracking my ovulation via tests last month i ovulated 4 days later then normal and only did the deed on that day . I had my levels done and they where very high ive also been very sick since 4 weeks . I had my dating scan and i expected to be measuring later due to ovulation but I'm actually measuring 4 days ahead. Has this happened to anyone else?  Could it be twins?