Tender tendons symptoms and conditions

I am a 51 year old female with lyme disease and co infected with Bartonella who previous to getting sick was very anti medical establishment and very anti--antibiotic.
After 8 months of treatment with other horrible antibiotics I decided to try Levaquin, even after reading these horror stories as I was desperate for relief. I expected ill effects from the moment I swallowed the first pill but by the 4th of 5th day my pain and brain fog began to recede and I am almost through with my second month and I feel positively human. I have had headaches nausea depression etc etc for 10 months so I can't say these things are related to the Levaquin. I do have tightness in my ankles and wrists but some tender tendons and swollen joints have actually improved. I am also taking 3000 mg of Amoxicillin so that make contribute to the relief. My doctor is very aware of the side effects and encourages me to pay a lot of attention to my body and limit any exercise or actions that strain the ligaments.
I believe this is a very very powerful antibiotic that is being used randomly and needs more research to determine who is at risk for these horrible side effects before it is prescribed in such a broad monner. I am happy for the forum and the discussion and the opportunity to make a leap toward health with this drug.