Tailbone misaligned

I’m getting desperate here. About at the end of my rope. Two weeks ago I was lying in bed and I coughed. My tailbone popped. I have been in horrible pain ever since. I’ve gone to my OB, a chiropractor, a massage therapist, a physical therapist, and I’ve done yoga. Nothing is helping. I feel like doctors aren’t taking me seriously and are just writing it off as typical pregnancy back pain, but it’s not. I know something is wrong with my tailbone.

Is there anyone else who this has happened to? What helped? I’m flying from the east coast to Hawaii in a few weeks and I’m about to cancel this trip of a lifetime because I don’t know how I’m going to survive sitting on a plane in this pain.