Signs of abusive marrage

Help me please! I have been married for 2 years now and we seem to be going great until it recently everything turned around. My husband is showing signs of being abusive. He first called me a bitch in an argument. He literally said "Bitch" I was very upset,he never called me names before.... and now we argue over little things and he gets So aggressive, he will get on top of me and put all his weight on me until I feel like I can't breath,I'm only 5'0 and weigh 115... he's almost 6'0 and weighs like 240.... please help me. What can I do. He's okay right until we argue then he turns super aggressive, never happened before but I'm actually scared