First, I'd recommend getting your Vitamin D level checked. Much research shows that MS is linked to Vitamin D deficiency. If you are low, make sure you suppliment with the Vitamin D3 form (cholecalciferol) instead of the Vitamin D2 form (ergocalciferol), because the D3 form is more effective.
Also, make sure to get your Vitamin B12 and Folic Acid levels checked. Deficiency of either one can cause nerve damage, numbness, etc. On the B12, if your level is below 400, then a supplement is advisable (even though the normal range is 200-600; some other countries consider anything below 500 to be too low).
I have experienced a lot of leg pain with my Lyme, and it follows more of a nerve pain pattern than a joint pain pattern, though it can sometimes center on a particular joint at times. Recently, I have been experiencing a lot of tingling in my feet and legs. This tingling started last year (prior to starting Doxycycline), and I attribute it to tapering off of another antibiotic (Ceftazadime). I find taking a particular homeopathic remedy helpful in reducing the severity of the pain and tingling - this remedy is called Causticum and I purchase it at a local health food store. I typically take one or two doses of the pellets and that is enough to combat the pain and tingling for a day or two...with no side-effects.
There is a machine called the ReBuilder (I have no finanacial affiliation with this machine or the company that makes it) that is supposed to restore proper function to the nerves. It is an FDA-approved device for the treatment of peripheral neuropathy and might be a non-drug option to look in to (ask your doctors about
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently weaning off TPN.
Meds: Pulmicort, IV Doxycycline, Heparin (to flush PICC line), Claritin, Singulair, Domperidone, Colloidal Silver (topically & nasally), probiotics, Liver support herbs, Ailanthus, digestive enzymes, homeopathy.