@malinaa215, it happens. I swore I was 15 weeks, I calculated and when I had my last period and sex and I thought 15 I went to the on and I was 9 weeks 😂 a whole month behind.
This is why my OB doesn't see patients until they are at least 8 weeks. They'll schedule and prescribe pre Bataks but won't even bother to check because of the disappointment of some not hearing a heart beat.