invasion of privacy??

I go to my dad's everyother weekend and this was his weekend. I came home today and discover that my blankets on my bed are torn off of the bed (im ocd) because my brothers friend needed a blanket. when there are other blankets in the house. then last night my mom slept in my bed and I'm not sure why. but in the past i have had people sleep in my bed then I told my mom to stop offering it to them. yet she continued to let people in it or use it. is this not invasion of my privacy after I've asked them not to do anything in my room? (I'm 14 btw)