Twins to One

Emily
Went in for our first appointment at 8 weeks 4 days and we were told that we were having twins (1st picture) went in today at 10 weeks 4 days at the high risk doctor and there is only one (2nd picture)...he said based off of first ultrasound he wouldn't have ever said there was a twin...I'm so confused because it really looks like there's 2 in the first :( I'm blessed to have one healthy baby but feeling sad as I know in my heart that there was 2