Has anyone ever had an ultrasound done where their cervix was said to be short one day and the next day back to normal?

I had my anatomy done on Friday and was told my cervix was low at 1.3. I was hospitalized for surgery on Saturday to perform a stitch. During prepping me for surgery, they did another look at my cervix and it was 2.8. No surgery was done. Even though it was good to hear, I'm still worried that if a misread was done on Friday, it's possible they misread on Saturday. But apparently my cervix curves and was told the curved part was not measured.

Had this happened to anyone? What was the outcome? Any advice?