My dog is being aggressive towards me

So ever since I found out I was pregnant, my youngest dog has been changing. He used to listen, not bark and be perfectly fine with me. Now, he barks at me constantly when I am home alone. My husband gets home and he acts like an angel. He has jumped on my belly, pushed me down when I've taken him outside. He does not listen to me anymore. I'm scared that he's going to jump on me one day and it's going to hurt my baby. I just don't know what to do. My husband is ignoring the whole thing like he doesn't believe that the does this all to me. My other dog is being very loving and cuddles up to me all the time. Has anyone dealt with this situation before?