I keep having dreams about having a sibling

So i have this thing.i keep having dreams of having a sibling suddenly. For context im an only child, my mom is 54 years old and had some issues with her reproductive system so there's a little chance she could get pregnant again and my dad is 72 years old so yeah. Every one of these dreams is a nightmare. I get so angry and I don't want this sibling and just beg that this is all a dream. Last night i had this dream and my sibling was actually a boy. I remember throwing a tantrum that I don't want him and how he's gonna live with us since we don't have a big house and I don't want him to be in my room with me and bother me while I study and I don't want to take care of him all the time. Why do i keep having dreams like this? I swear i had like 10+ dreams like this in the past year. In the recent dream i even remember going on reddit and asking for help how to calm down in this situation 😭

I actually love kids but also love being an only child and having my independence, peace and freedom. And I would never ever want a sibling since I'm 17 and if i had a sibling a 17 year old gap would be insane. I'd accept a sibling if she or he was the same age as me or one year younger or older than me but other than that no. And sharing my room is my actual nightmare. My room is like my kingdom, my sacred place 😭 and it's only mine and mine only..

Could someone help me understand these reoccurring dreams?