Even though we knew it was coming when my mom died, I think after we all went home, my mind just about shut down. I had a really bad time 6 months later. I called my sister to ask if mom was really gone and she said, "yes". We lived 1500 miles apart so it was like mom was just on vacation. We do all mourn differently, there are no rules.
My heart goes out to you, I am so sorry for your loss.
Barb