My cousin had no clue she was pregnant as her cycle had always been irregular and she gave birth the day her grandmother was being laid to Rest . It’s very possible I also has a similar experience where as pregnancy test were negative , ultrasound was negative so Dr scheduled me to have a tumor removed from my ovary and uterus . I was having my cycle every month but at 11:00 AM my childs sperm donor dropped me off at the hospital and 39 minutes later that so called tumor was out and crying !!! I kept telling the doctor that I was pregnant and he kept insisting that I was in denial of possible uterine cancer since my test results were negative for increased hormone levels