I just had the same thing happen, at around my 5-6 week mark for a couple of weeks. Suddenly started being nauseated round the clock and nothing sounded good. Around the same time, I also started with lots of burping. It is much better now, and I don't know if it was just a phase or what. One thing that may be unrelated, but I had started eating some protein bars and they had the sugar alcohol in them. When I stopped with those bars, the burping really slowed down. I don't remember if the nausea stopped right then or if it calmed down a bit before. Play with your diet to see if it's something you've added in that you can't tolerate yet. Be sure to get your protein and liquids in, as I've read other posts that say that contributes to the nausea. And, talk to your doctor; things such as gall bladder problems might be a factor too. Good luck.