Dream About Grandma Giving Necklace Party

This dream was about

So I just had a dream about my grandma who passed about eight months ago. In the dream, she was still alive, but still really old. She was having some kind of celebration with all her family there and during the celebration she was going to give away the things that meant the most to her, to her family members. It was like she knew she was dying so she wanted to give away the things of hers that she loved the most, to the ones that she loved the most. So before the celebration, she gives me this silver necklace with these beautiful diamonds and emerald stones in it and she put it around my neck lovingly, and I looked down at it and it’s beautiful. I hug her and I thank her and I tell her that I want to go get dressed for the party. There is so many people there and so many suitcases that I can’t find mine. I’m looking everywhere, even outside where I find clothing that is blowing away, but it’s not necessarily my clothing. There is just so many peoples clothes and luggage there that I just can’t find mine in all the chaos, so I can get dressed for the party. It seems like I’m searching for hours for my suitcase and I can never find it. The party, by this time, has gotten started and I come out in what I think is my old clothes and I hugged my grandma and I thank her for the necklace and I tell her how sorry I am that I’m in my old ratty clothes and I’m sorry that I can’t find my nice ones to change into. She looks at me and she smiles and she says that I look beautiful. I looked down at my clothes and I’m wearing beautiful outfit, with the beautiful necklace that she had given to me earlier. Her and my mom kind of smile knowingly at each other and they say it’s always the three month mark when she finally gets it. I don’t understand what they meant by that?