Getting steroid shots next week

I'm 31+2 today and ultrasound showed that my cervix length plummeted again, from 2.3 two weeks ago down to just 1 cm :-/ I've been on bed rest for 7 weeks now and the cervix was pretty stable. I don't believe I did more in the last 2 weeks, but apparently it still went down. I am allowed to still attend my baby shower on Sunday. Re-check on Tuesday, and getting my steroid shots the same day. If I'm lucky - I'll get the shots and go home, or I can be admitted to the hospital if I lose any more length. Little scary. Hoping to keep my babies in for much longer!