Thanks for keeping us posted and I am following your thread and am curious how the antibiotics ultimately affect your symptoms and ASO titers.
It's quite interesting. Some minor symptoms indeed seem to get better (e.g. neck pain), but what's striking is that my heat intolerance has almost disappeared. That started with the first antibiotics course a month ago and it seems to continue now. In fact, if anything, I am starting to develop some cold intolerance, which I think might be kind of a normalization, because I was rather feeling cold a lot before my CFS started.
My mom just entered my room, which has 22.5 degrees and she said it's too warm, but for me it even feels a bit too cold.
My appetite has also decreased starting with the first course of antibiotics. I used to be a rather slim person pre-CFS. Since CFS started, I've felt hungry all the time and I gained 35 lbs and became overweight. So having a lower appetite is in my view also a step 'back to normal.
What I can definitely say is that the antibiotics changed something. But they did not substantially improve the main symptoms, i.e. fatigue, brain fog, heart palpitation, overall diminished mental capacity. Discomfort in the kidney area also hasn't improved much.
I should also note that no symptom has worsened. Overall I would say the antibiotics made me mildly better, but not much.
I think this response would be consistent with there being some kind of bacterial co-infection that produces or exacerbates some of the symptoms, but clearly is not the cause of the CFS itself.