Hi Doctor. Im Pregnant 26 Weeks And 3 Days. In

Hi doctor. Im pregnant 26 weeks and 3 days. In week 22 i had the consult and the doctor said my cervix was short in 2.9, two days after i went in an other doctor who dodnt told me the measures but sure me that i was fine. In week 23 i went to another doctor for consult and my cervix was 3.14,,
Yesterday i went to my firs doctor and he said that the length was 2.5
I dont know what to beieve.