“我心情不好”用英语都能怎么说？

"我感到很沮丧/焦虑/不高兴"等都可以用来表达"我心情不好"的情绪。"I'm feeling very down today."或"I'm having a bad day."等。

1、"I am feeling quite upset."

2、"My spirits are not at their best."

3、"I'm having a really bad day."