Cervical funneling

Yesterday I went in for an ultrasound due to spotting that has been going on for 1.5-2 months. I was told I have cervical funneling and was put on a lift restriction and pelvic rest. I am 24 weeks and had a csection 8 months ago (if that changes anything). I am curious if anyone knows what this means for me. Is preterm birth something I need to watch out for? Are there any things I should ask of my doctor such as steroids to help my babies lungs grow or anything to help us through this? Really I’m just looking for any and all the insight I can get on this as I’ve never experienced it before.