Need more respect

So I was out to eat with my SO today and he burped real loud, ate food off my plate, and I just felt embarrassed. So when we got into the car I asked him that next time if he could use more manners. He basically turned it around on me and said I was ungrateful. I feel like I am constantly trying to get him to understand and respect my wishes. I'm 30 weeks pregnant and I just expect more from him. Am I wrong? It doesn't help when my mother is doing the same thing to me by claiming me on her taxes without asking, then getting mad at me for being upset over that? It feels like no one respects me nowadays and treat me like what I say doesn't matter. I honestly don't know what to do anymore about this. I feel SO stuck. No one listens to me. :(