So sorry you are having to go through so much suffering.
Hope you got the fluids you need. Please try to drink fluids with electrolytes in them. Powerade is a good one, because it also has sodium in it. White cherry doesn't have the glycol ester that I was told is bad for you.
Try to remember everyone grieves in their own way.
Everyone's emotions can heightened and raw at times like this.
My dad died last Dec and then my brother died in June. They were not young but were the last of my immediate family. I do have a husband and he seems to deal with death of family and friends by not dealing with it.
Here is to hoping life will eventually calm down.