Do any of you ladies have a pessary? I have been reading about them because my cervix is pretty…

Do any of you ladies have a pessary? I have been reading about them because my cervix is pretty short and I'm only 26 weeks pregnant... it was 4cm at 20 weeks and then at 24 it was over 2cm and now there's a little over 1cm left...I have an appointment on Tuesday and when I went to the hopsifal on Thursday they said they would talk to high risk doctors about maybe doing it. Any experience with them?