You are in crisis right now. If your therapist accepts calls, call her now. Personally, I've found crisis lines to be less than helpful....but if that's your only option, you may need to consider it.
I don't know you, but based on your other posts this week, I suspect you have become overwhelmed by your "research" into your symptoms and your current stressors in your life. And while it may be factual that you currently have no supports, part of this is your depression lying to you.
Healing isn't a "one and done"....it's a process...and it takes time. But I can guarantee that there are little pockets of calm (even joy) in the storm. And those pockets get bigger and bigger the further you go.
That said, you can't work on you shit while you're in crisis. You need to stabilize. And during stabilization, you start to learn tools to help you when you cycle around again.
Personally, ,DBT has been a life saver for me in terms of gaining the tools I need to do my trauma work....but I also understand it's not been helpful for others.
HOWEVER that's to consider later. For now - call your therapist. Your only words need to be "I am really struggling and I don't know what to say or do".