Mine started week 5 and still going strong. I am nauseaus pretty much all day long but only threw up once. Sometimes I think the nausea is worse b/c I'm always afraid I'm going to puke and nothing sounds good to eat except the weirdest things. I am not a fast food person at all but I've eaten Taco Bell, Culver's and Wendy's the last three days. The cravings come on so suddenly, it's strange.
The one time I attempted to eat something that didn't sound good to me, I threw it up five minutes later. I guess I learned my lesson...
I just hope this gets better soon :)