You and your doctor may find this article to be helpful:
"Subarachnoid hemorrhage in a patient with lyme disease."
www.neurology.org/content/48/2/520.abstract?ijkey=a7ab692ecfa54a0ae7ad7c2c5ad2bd69370b895d&keytype2=tf_ipsecshaSteroids will reduce inflammation, but they also cause the immune system to be further inhibited so that you are getting no help from it to battle these infections. I've not heard of anyone healing these infections while using steroids, unless it's very low dose cortisone for the adrenals. This may be what your doctor is doing. It sounds like you are likely okay with the dose you are using. You will likely find this article helpful:
www.nadf.us/adrenal-diseases/secondary-adrenal-insufficiency/