An Infectious Disease physician needs to be consulted if you aren't currently being treated by one.
Bone infections are long-term, there are no quick-fix options. If you have any other chronic health conditions, that can extend the treatment time further.
What were the sensitivity results of your culture(s)? Do they include doxycycline or tri-sulfa?
Do you have any hardware implants?
I contracted MRSA in an ortho procedure, and my treatment included 12weeks vanco, 8weeks dapto, then doxycycline orally for 10 months. I also had multiple surgeries to clean out and remove damaged bone. I'm taking additional calcium, iron and magnesium to support bone healing.