No cerclage suggested bag on cervix

I’m 24 weeks and my bag is right on my cervix and can come out at any time. My cervix is short I think at a 2 and I’m dilated 2cm. I haven’t gotten any contractions and I’m going on hospital bed rest to basically see what happens. I mention a cerclage and a pessary and they said that it doesn’t work for twin pregnancies but I see all these women who have had one and it worked for them. I feel like they just don’t know how to do them or something. They aren’t doing much for me (only gave me a beta shot that I asked for) and basically said to wait it out and If I go into labor then I do. It’s so frustrating to see other moms get the most help and nothing is really done for me. I’m so disappointed and I feel defeated