Need advise

I'm 30 weeks pregnant and feel as if my partner doesn't try to be understanding to my emotions or helpful around the house. He makes promises telling me he will help me seeing how I'm growing and things are becoming difficult but he doesn't take action. He begins to tell me things that upset me and still continues even when I tell him what he is doing. What should I do? Im scared to do this all on my own but I feel its time to leave since I'm only getting let down so much.