No further testing is indicated. Once treatment is started, lyme care patients frequently get worse for a while. This is due to the toxicity of the dead lyme bacteria's body fluids which enter the bloodstream. This intensification of symptoms is called a herxheimer reaction. The most common are babesiosis and erlichiosis.
Rickettsial fever is possible too.
I was on antibiotics four different times and never got well, relapsing after each treatment session. The disease also becomes more difficult to treat with each interruption. I have seen a slow but steady improvement in my health over the last several months with none of the frequent setbacks I had seen while taking prescribed antibiotics. Besides a regimen of common vitamins and the usual herbs, garlic and a couple of others, I rely on ledum, colloidal silver and Hungarian mistletoe, also known as European mistletoe. I also use a RIFE machine which produces a pulsed signal that appears to kill the Bb bacteria.