This was me about a month ago.
The thing about Hashimoto's is you never know when it will hit.
As I told a friend this week, I don't like to make a big deal about this stuff....I truly believe that we don't want to feed the fire of negativity and that staying focused on the positive is the way to go. But I have also come to the understanding that on those days when I am getting slammed with this autoimmune crap, it is simply best to be honest with people. Simply telling people, " I am not do....(insert whatever activity)....today because...(insert whatever it is throwing at you that day) and explain the facts" usually does the job.
I have had several people email me in the last few weeks about their own struggles with this autoimmune issue. I don't have all, if any answers at all. I too am just figuring this stuff out. Years of ignoring my own physical needs and simply "pushing through" meant that I did very little research on this issue for myself., until now. And admittedly, now, I have found so much contradictory information out there that I am still sorting through it all as well.
HOWEVER, the things I do know, and have been forced to learn, is the importance of being kind to myself, doing what I can to get back to perfect health, and listening to my body when it is crashing.
In the past I would push through, ignoring the signs and tell myself to get over it and take care of business....now, I have to force myself to rest. Resting has never been a luxury I felt I could afford. Now, it is a requirement. But, I still have to mentally "allow" myself to do it...