Hugs to you Melalvai! I hate evaluations too, but I try to teach myself ways of reducing stress from things like this. One that helps, when it works, is not relying on my first gut reaction, which often can be very uncomfortable. I know intellectually that I easily jump to conclusions and over-react, and sometimes I can talk myself through a different kind of reasoning, and try to think how I would react if that were the case.

Let's say your boss is concerned about your productivity because he values you very much, sees great potential, and is concerned that you're unhappy or stressed in your personal life, or that something at work is holding you back. How would you feel about that? Just a thought to try out. Sometimes bosses just word things badly.

Your stress reaction sounds very severe and painful, I hope you figure out how to reduce it.