How can I make my wife feel better ? [I Marriage]

My wife is 8 1/2 months pregnant she really hates me right now she thinks i did this to her. She tells me that she's fat I keep telling her she's not one minute she's hugging on me like crazy acting like I'm the only one she wants next minute she wants nothing to do with me and wants me to leave her alone. Yesterday at our wedding she was going crazy. It wasn't a big wedding just a private one with me and her brother and a few of his friends. She's just been crazy here lately a lot more than usual I'm kind of worried about her. Is this normal ? How can I help her feel better ?