You know your horse best and more importantly, what resources are available to you. Since I don’t, I’m not going to try and give you advice based on a couple of photos you posted on a thread.
Sounds like you are very attentive to your horse’s comfort. Don’t beat yourself up for trying different things, even if they didn’t work out as you hoped. Mistakes are how we learn and grow. Horses are resilient and the body has an innate ability to heal. You will be able to get your horse comfortable again, though it could take longer than you expect. Trust your gut. Keep asking questions and learning. And if you feel your resources are limited locally, don’t be afraid to reach out to professionals outside your geographic area for consultations or support.