High risk?!?!?

I was at my anatomy ultrasound and they told me my cervix is about 2.5 when they like to see a minimum of 3. So they are sending me to a high risk doctor. I tried asking questions, but wasn't getting anywhere with the nurse practitioner. Does anyone know what this could mean? Is it possible they saw or noticed something else along with that and that is why I am all the sudden high risk?

I guess I just always thought high risk was supposed to be for something serious and I don't understand how my cervix qualifies me as high risk. I feel stupid for asking, but I really don't know much about all this stuff and they wouldn't explain it to me 😣☹ felt like they were just trying to give me a quick answer and get me out of the room.