Has anyone ever been diagnosed with a dynamic cervix? I was today, I have history of preterm labor…

Has anyone ever been diagnosed with a dynamic cervix? I was today, I have history of preterm labor (had my middle son at 36 weeks) I am worried baby girl will come too soon. If you were diagnosed how far did you carry you baby? I also have to have iron Transfusions because I am extremely anemic. If it's not one thing it's another. 😫😫