How to tell my therapist about my depressive episode?

Lately I’ve been feeling really bad again, I cry almost every day in the afternoon, sometimes even before school. In school I get irritated more easily and im annoyed by my classmates, I feel joy only in some situations, but I noticed when I had a break and went to go buy food I zoned out or felt this emptiness again even tho I were with my friends. I can’t really talk about it with them tho. At home the situation has not been good too, my mother is under constant stress because she has to care for my grandma since my grandpa got into the nursing home, and we often have arguments about little things, today it happened again, because of this I get really upset too. I also go to therapy but she only diagnosed me with social anxiety yet and still is doing analysis. How can I tell her how bad I have been feeling for the past weeks?