If you have Lyme, don't take the Prednisone - it will greatly reduce your body's ability to help overcome the Lyme. Also, take a photo of the rash. Put a ruler or a coin next to it for size comparison.
Check out the thread at the top of the forum titled, "The Basics - Newbies, check this out!"
And you might want to make a separate post asking for recommendations for Lyme-Literate doctors (LLMD's) in your area.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Pancytopenia, chronic malabsorption/malnutrition, etc.; G-Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Heparin (to flush PICC line), Claritin, Colloidal Silver (used topically), IV Milk Thistle, probiotics.