Is there a way to explain that I missed orientation because of anxiety other than saying I had a panic attack due to my apartment being uninhabitable.

I wanted to go, but I didn’t reschedule until days later after I missed orientation. My apartment became uninhabitable after I got hired and I feel like I was going through a breakdown. My unit is still not repaired or up to code. I stopped eating and talking to friends. When it came to orientation day I just couldn’t move my body to get ready. I do want the position and asked to reschedule orientation which my manager agreed to, but she also asked why I didn’t show up. Not sure if this is the right place for this post.