Scared of losing my babies

Right now I'm in the hospital on bed rest and been here since Monday evening after my doctors appointment. I was admitted into the hospital for a short cervix and was experiencing slight contractions (that I didn't know I was having ) . I'm annoyed and really scared of losing my twins. After experiencing a stillbirth at 23 weeks last July I'm just really scared going through this all over again. I am 19 weeks right now and will be here til my due date or until they decide to arrive which I hope it's after 26weeks. Any moms been through what I'm experiencing right now !?