Girls, hello. I have such a question. They all told me that I have a …

Girls, hello. I have such a question. They all told me that I have a short cervix, now I look at my ultrasound, it's 3 cm. Is it considered short if it's less than 2.5 cm? How am I supposed to think about this? On the internet they write everything about pregnancy, but in normal condition there is nothing. To the doctor I will go only in early August, so from her I got out and here today I am going through documents and everything related to medicine, found and sit thinking. I start slowly planning a pregnancy and fear is still there. (Last year's ultrasound)