Sorry to read of your loss, I can relate to the loss of a mom. A little over three years ago.
When you mention, your T seems mad, could that be just part of the anger that comes with the grief process?
It is an overwhelming sadness, indeed, and may feel like the world came crashing down around you. Your life on this Earth is important and you matter.
There is a self injury forum here, and a hotline, as well. Get yourself, all the support you can get, right now!!
Hang in there.