My dream

Yesterday, I can still remember my dream. It was all about my teeth. Back when I was a child, my grandmother always told me that whenever I will have a dream about losing some teeth, the moment I’ll wake up, I should bite a wood to avoid the bad happenings. She told me that the meaning of that dream is that someone in your family or relatives will die. I didn’t believe that kind of superstitious beliefs. I asked her why she always had this kind of beliefs and she just answered me “I learned this to my mom and grandmother before and they keep on telling me that if you will follow and just believe, it is not wrong and you will not lose something if you will just follow the superstitious beliefs” and I was like “ok”.
But yesterday I dreamed about I was in a dental clinic and the dentist tried to take off my tooth and when the dentist was still om the process of taking my tooth, the tooth was broken like a glass because it was not strong anymore. After that I woke up from my dream and just didn’t mind that sht and I sleep again. I forgot to bite a wood. And then today, we received a text message that the sister of my grandfather died. I told my grandmother about my dream and she said “she’s the tooth” . Is this a coincidence or it’s true? Do you have the same experience like mine?