I have a wonderful puppy, but he’s kinda become a dick, and really protective over me. When someone…

I have a wonderful puppy, but he’s kinda become a dick, and really protective over me. When someone comes in the house he’ll jump up in my lap and start barking and growling at whom ever comes in. He gets into things he’s not supposed too, I got a toy for the baby but he thinks it’s his and I had to put it in the dresser I have all her other things in. I’m kinda nervous for when the baby comes because I’m not sure what he’s going to. Any opinions on this one? He’s almost a year now.