Measuring weeks ahead

Veronica

So a couple of weeks ago I want to my doctors appointment and I was 22 weeks and my uterus was measuring 27 she had me go for an ultrasound a week later because she wanted to see the growth of the baby everything came back fine. So today I am 26 weeks and my uterus is measuring 32 weeks my doctor can’t tell me why I’m so far ahead now I have another ultrasound in 2 weeks.. Has this happened to anyone before ?