Yes, i can relate with the levaquin nightmare. I've tried many meds throughout my journey and nothing compared to the levaquin herx. Knee pain, shoulder pain, foot pain, calf pain, burning sensations, tingling, numbness, depression. Good stuff!
Eventually you might have to stop due to tendon issues or neuropathy. Pulsing one week on, one week off might become a better strategy for you in the future. This will allow the tendons to recover a bit while the organisms take longer to bounce back than 7 days.
Your LLMD has a very good plan. I think one week on, one week off or two weeks on, one week off is a great idea when it comes to this class of drug.
Another strategy is to consider beating the suspected bart or mycoplasma type organism down with a combo of a macrolide/tetra class and bactrim abx combo for many months before(6-12). This way it will be less brutal when it comes time to trying levaquin. And will also require less time on levaquin.
I did levaquin ages(years) ago with minimal prior abx treatment and it was a nightmare. I would rather not talk about the first levaquin experience. The second time around, after a year of Roxithromycin, Bactrim, Doxycycline rotated with Biaxin, Bactrim, Tetracycline. I didn't notice much pain at all the second time with levaquin. My theory was less germ load which was decreased via a safer abx route prior. Which allowed me less time on levaquin the 2nd time and less herxing.