Had you ever used a TENS unit before this?
If not, then 20 min. is way too long. Should start with maybe 5 minutes and work your way up. Yes, it probably did stir up a herx or some kind of "healing crisis." Perhaps a hot bath with baking soda or epsom salts would help?
Sorry you are in so much pain and having trouble with relapses... I hope you feel better soon,
Chronic Lyme & Bartonella, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, etc.; G-Tube; TPN via PICC (trying again to wean off the TPN).
Meds: IV Cipro, Heparin (to flush PICC line), Singulair, Claritin, Domperidone, Colloidal Silver, probiotics, digestive enzymes, Milk Thistle & other liver support herbs, Magnesium, Progessence+ (wild yam + essential oils), Moducare, homeopathy.