Could the first ultrasound be wrong?

[Mary_E]

Hi! I recently found out I'm pregnant. My cycles are usually 23-28 days and due to me lmp I'd be 7 weeks 3days(give or take a day or two). I had extremely light spotting in the beginning of the 5th week(only lasted a minute just when I wiped). My doctor decided it was the start of a miscarriage and sent me for an ultrasound but wrote in the wrong date, she put I was 11weeks pregnant but the most I could be was 6. Based on her info I was declared to be having a missed miscarriage because the baby stopped growing at 6 weeks and I was 11weeks along. I fought her on the diagnosis and she ordered more test the blood work came back positive and my hgc levels were perfect for 6 weeks. I went for another ultrasound a week later and we could now see the baby in the sac from the abdominal ultrasound and the internal ultra sound showed the fetal pole attached to the yolk sac at the top where the previous ultrasound the yolk sac was at the top of the sac and the pole was at the bottom. I thought it was all a good sign but the technician said there was still no heartbeat and dated it at 6 weeks 4 days(previous ultrasound was dated at 6weeks 3days). She it possible the first ultrasound could of been dated wrong? And the baby could be viable still? I'm prepared for the worst but just curious if there is any hope. My doctor is not the most compassionate and just handed me a letter when they declared a miscarriage the first time based on the wrong dates. Just looking for some answers.