I don't think it's bad at all. I'm 15 weeks and I have lost 13 lbs. I was extremely sick with this baby but my doc told me to eat crackers (which I hate) dry cereal and small meals. I started doing that & I am much better. I still have to force myself to eat. I hope you get better.
Everyone is different, you should probably talk to your doctor about your lack of appetite, maybe he/she can help in some way. Is it because of nausea? I wish I haven't gained weight, lol, we're due the same day and I've gained 8 lbs already... oy vey.