It may not be connected, but if you had the bacterial infection prior to the onset of these varied symptoms, I wonder if your GP hasn't suggest a Rheumatologist rather than a Neurologist. [The night sweats and the joint pains]. I think there are several types of bacteria that can cause mastitis and maybe it wasn't totally cleared from your body.

No rash or fever or light sensitivity or anything like that now?
It's the joint pains that would concern me.