I was on xenical just before I found out I was pregnant. I was on it for about 9 days and when I told the doctor she said not to worry at all because it only makes the baby have a low birth rate when taken the whole or some way through pregnancy. I also had a very very very happy xmas (i would have been around 2 weeks pregnant) and the doctor said that was way too early for anything bad to happen. To tell u the truth, I don't know anyone that didn't have a "big night" in early pregnancy but of course didnt know that they were pregnant. If u stop now everything will be fine but go and see your doctor just to be reasured.