I am just starting into my 7th week. The nausea has hit! I thought I might get by without it, since I hadn't had it yet and I didn't have it with my first one, but boy was I wrong! I have night sickness as well. I am fine in the mornings, but come between 4 - 6 pm that is when the nausea starts. No throwing up, just a constant nauseated feeling like I could throw up at any time. This usually lasts until bedtime.
I have also had horrible acid reflux from the beginning. I can't call it heartburn, really, because it doesn't settle in my chest. Just acid that travels up into my throat. This could be due to my diet, though, too. This is my 3rd pregnancy (will be the 2nd live birth). With this one I am craving spicy food like pepperjack cheese, and taco bell's mexican pizza.
So far the only thing I have found to help me with my night sickness is to keep sipping water, and to eat small meals and snacks throughout the day, especially when the sickness hits. Nibbling on cheese and crackers seemed to help. I also read where ginger and lemons can help. Gingerale, ginger capsules, etc. True ginger. As for lemons sucking on fresh lemons (envisions face puckering, yuck!) or sipping lemonade. I haven't tried this out yet for myself.
Oh, and believe it, or not, having sex has seemed to help me, too. I think only because it helps to take my mind of the nausea...Lol.