Super fast weight loss in beginning of pregnancy??

Anybody else have little to no appetite around this time in pregnancy? It started maybe around 7 weeks, I was so nauseous and would get sick constantly.. but I haven't really been sick like that since then. But now I'm 12 weeks and have little to almost no appetite what so ever. I basically force myself to even eat a single plate, and that keeps me full for the rest of the day basically. I've actually lost weight because of all of the nausea and no appetite, I went from about 205 to 180, so 25 lbs total. Anybody else lose alot of weight in the beginning??