What do you do when something physical improves your symptoms - like how do you mentally integrate that with this theory?

Hello again. So recently I had to take a strong course of antibiotics. I assumed it was going to make me feel shitty. But to my surprise? I actually had my debilitating migraine, my food sensitivities, and my POTS symptoms all lift or significantly improve for about 5 days, for the first time ever, during/following the course. Then they all returned once I’d been off it for a few days.

I’m struggling with this because it really makes it seem like perhaps my sickness is caused by some low grade infection. Which might mean I need antibiotics or some other treatment and that the nervous system model of recovery won’t be enough. I doubt it was placebo because I only even realized in hindsight that it lined up with the antibiotic course. Is there a way to have these both be true at once? How to I stick to this ideology after that experience?