If you make bonus AC every month your character will not build up anything unless you want them to (since you CAN remove the effects but you don't HAVE to). Incidentally, if you make bonus AC for, say, December, but you don't want to use the level one removal until February, you can do that.

The first opportunity to be completely symptom-free will be November's AC! Even though that's a month where nothing is being added, you can still remove symptoms.