Sweating right after eating...
Check with the surgeon to make sure nothing is awry.
Definitely rule out thyroid if you have never been tested. I refer counseling clients with anxiety and depression to get it tested all the time, and 25-30% of the time they were misdiagnosed with a mental illness. It is certainly not always the case, however it never hurts to check.
This always happens when I eat carbs, too, as people mentioned. If I stick to protein low carb it basically never happens.
I follow a ketogenic diet post-op. I also have a diagnosis of binge eating disorder. Feel free to ask me about either!
It is not that we have so little time but that we lose so much...the life we receive is not short but we make it so; we are not ill provided but use what we have wastefully. -- Seneca, On the Shortness of Life