I can't comment on reflexology specifically but I can give you an analogy. Once I reikied myself when just getting a cold. Sometimes a healing method will accelerate healing when something has already hooked on. But this was the very, very beginning and when I was done the session, the cold had moved right out. However, for a few years of my life, I would get a sinus infection after a cold. Distinctly different and very annoying. Happened everytime, like clockwork. So this time, when the cold left almost instantly, I became plagued with the sinus infection right away.
Perhaps something similar had happened here? I was not always prone to sinus infection and no longer get them, but at the time it was step 1 heal from cold, step 2 deal with sinus infection. Maybe you moved something out and this is a secondary phase?