You will find relief and peace with the grieving process. I took care of my mom very hands on the last 2 years of her life.
The day after she passed here at the house. I couldn't hardly get out of bed or eat. I couldn't understand it, I took care of my dad before he passed, but not as long and not as intensive.
When he passed adrenaline kicked in so I could do arrangements and other business stuff, then it hit me.
My friend said that with taking care of my mom, non stop, all my adrenaline had been depleted.
You are just so mentality and physically exhausted, but it will pass.