Yep, I’m about a week ahead of you and don’t keep my dinner down most nights. For the most part, though, I feel a ton better than before, and I weaned myself off Zofran a couple weeks ago.
In general, the concern is at this point is not for the baby’s health; it’s for yours. Babies are really wonderful at taking what they need from your body’s natural stores. For example, say your baby needs calcium and you aren’t getting enough calcium in your diet to fill those nutritional needs. Your baby actually “steals” calcium from your bones, which is a contributing factor to developing osteoporosis (literally frail/brittle bones from a lack of calcium) in your later years.
In most cases, the concern is mostly for the mother’s body and mother’s health. Not getting proper nutrition for a short period of time is usually not serious, but if severe enough, nutritional deficincies can lead to critical health issues while pregnant. Typically, your body will start sending off warning signs long before that happens, and your doctor will notice your failing health and treat you more aggressively.
From my own experience, I have a genetic condition called hyperemesis gravidarum. It may be something you want to research and talk to your doctor about, if you have a lot of the symptoms. In short, I pretty much puked every day of pregnancy with my first baby (although I went through some periods of puking multiple times a day and some periods of puking only once). I’m pregnant with #2, and while I haven’t been as sick, I’m still puking most nights. One thing I would really encourage you to do is talk to your doctor about how often you’re getting sick. There are other medications besides Zofran you can try, and your doctor should be able to look at your overall health and decide if puking once a day is seriously affecting your health.
Also, if you are generally puking after dinner each night, try and be proactive by eating more during the day. I eat about every 2 hours, right now, and try to get through 2 Nalgenes of water while I’m at work. I know my dinner is most likely going to come up, so I try to plan around that by eating something small and easily digestable for dinner , like yogurt. Ugh, there’s is nothing worse than puking up a really solid meal. Finally, make sure you are taking your prenatals every day. It’s always best to try and meet your nutritional needs with food, first, but prenatals are an important backup for those of us who have a hard time keeping down food. Along those lines, my doctor said to eat whatever I can keep down to try and get as many calories absorbed into my body as possible; it may be a strategy you want to ask your doctor about, as well.