Rib injury

Hi, I was in a car accident a couple of days ago and I hit my rib cage on the middle panel during impact. I went to the hospital, they took x-rays and first said that there is just a fracture. I called today and they had the x-rays re-examined and said that there is no fracture.
I thought it was just bruised from the impact, but yesterday as I was getting up, I felt my rib pop out of place and the pain was excruciating.
I’m not sure what to do now or who I should go see. Everything I’ve read simply said that the best thing to do for any rib injuries is just to rest and breathe normally. Any other advice for me?