(((Suraya))) I'm so sorry, and I agree, she really should have some sort of backup person just in case her clients have a crisis. As you yourself said, even if you were fine last time, stuff happens... and it's not fair to leave you hanging for that long with no support.
Lots of hugs... I wish I had some great advice to help with the crying and breakdowns

, I'm so sorry, it sounds really rough.
Is there any way to manage any of the things causing you to be in crisis? Like... when I'm really depressed, I don't answer my mom's phone calls. I screen my calls with an answering machine, because she makes me feel worse. It sucks, but I know that at some points, I can only deal with so much - and my mom is just going to push me over the edge of what I can deal with. So, part of my self-care is cut off contact with her when I need to, for my own sanity.