Not sure if this will help, but, oddly, I have a student in her 30's who was telling me just last week that she pulled a muscle in her butt cheek. I asked her what she did and she said she saw a chiropractor (we have a chiropractic program on campus so it's free for staff and students). She said he massaged her butt cheek for 3 weeks and now she's completely better. Before this, she was barely able to walk. The reason I'm telling you this is because if you have a chiropractic school near you, you may want to check with them to see if you can be serviced for free or at a minimal charge since their students need to do many hours of clinicals before graduating so they are sometimes eager to accept patients. Just a thought, I hope you feel better soon.
Hugs & prayers,