If you can only test once per year, I would do it for the seasonal period as that is when things can get really off track super-quickly. It sounds like you have a good management plan in place so keep an eagle eye out for any symptom changes that might indicate things are going in the wrong direction and plan on pulling blood in Aug for ACTH, insulin, glucose.
Lavinia, Dante, George Too and Peanut Jan 05, RI EC Support Team