Anyone been through it ?

I went 2 my 1st ultrasound I thought I was 11 weeks going by my lmp but at the ultrasound they told me I was 1 week 3 days ahead I’m very very regular I found out I was pregnant 1 day after missed period because like I said very regular! Anyway I didn’t like my 1st Dr she was very rude I went somewhere else!! which I love ☺️ lol when she did my ultrasound I was exactly the same days as I should of been based by lmp anyone else went though that & what happened???