Help! My fiancé stinks

Ok, I'm 7 weeks preagnet and almost every day. I'm frustrated by my fiancé and his hygiene. It seems like every day he gets worse than the day before. No shower, sleeping in the same clothes he has, had on for a day or two. I tell him his breath stinks and he does nothing about it. I'm not shure. I can take much more. I love a clean, fresh well dressed man. Now I feel as if I'm engaged to a teen. I say something to him every day but it hasn't made a difference. I'm getting to the end of my rope. What can I do. Or should I walk away....