HI Puppies,

I feel for you as I am getting a lot of rib pain myself ( nothing like yours though) but I see an osteopath as opposed to a chiro. If all the chiro does is to put it back into place, it could also be that there is something else twisting or causing you the rib to get out. Maybe try to see a physio or osteo or even a different chiro. My osteo looks at what is causing the pain as opposed to just crack & fix where it hurts (if that makes sense) sometimes, you might have a lot of pain under the shoulderblade but its all because your pelvis is twisted in the first place and its like a domino effect.
That's of course my opinion as chiro and physio never made me better only made it bearable ( long history of backache) where as my osteo did and I never looked back. That's what worked for me, so it's all about finding the right treatment that works for you, so don't be shy to experiment and see different types of specialists
Maybe you could see if your DH might be able to massage your ribs or around the area, carefully of course.. but once thing is for sure and that is stretching & a proper posture will go a long way too.

Wishing you all the luck, hope you get some relief. Are you sleeping with a pillow between your legs too? that might help your body not crushing so much and keep everything in line.