When I was feeling so terribly anxious that I couldn't eat much, I just retreated to my room. I wasn't hungry, and that was as much as was said.
Maybe my parents felt it was better to present the appearance of a perfect family than face the reality of problems. Seeing a shrink was often presented as a threat - you better shape up or you'll have to see one.
Since I didn't have the practice of describing my emotions, I wasn't experienced in recognizing anxiety, sadness, etc. I think learning how to describe a mood is something that gets better with practice. Looking back, I can label times when I felt anxious or depressed or manic, but at the time I was just in the moment. Acting on my emotions, but not taking the time to think about them.