The girls went to the maternity ward today because they checked and sa…

The girls went to the maternity ward today because they checked and said that the cervix is open one finger, but I don't have any signs. They said if I don't give birth on the weekend, I should come on Monday to get a catheter inserted. What is this? I had my second delivery, first in the day I gave birth myself without anything being done. Here it's scary. Who can put this in? How does it work? And maybe there are some ways for the birth to start by itself. Thank you in advance for your answer ?