Clingy 3yo after grandparent death & giving up dummy

[Laurakbr]

Hello,
My 3 yo has been super clingy the past week and her behaviour and sleep has been quite bad.
Her (paternal) Nana died a couple of weeks ago and she also recently gave up her dummy which she used at night to help her sleep.
The past week she's been having quite bad tantrums about small things (brushing her teeth, putting on shoes) and has been saying everyone else but me (mummy) is "weird".
I guess I'm just after a bit of reassurance that it'll pass and some tips of how to cope? I'm trying to stay calm with her and be there for hugs but honestly I'm exhausted.
Thanks!