I'm 9 weeks pregnant and I've lost 22lbs!

I have always been that small 5'3 115lb A-cup girl but when I hit 19 I guess puberty hit me like a truck, and I hit a high of 169lbs DD-cup. Now I'm 22 and ever since I got pregnant I've been losing weight!! Now I'm 147lbs! I love that I'm finally losing it (what girl wouldn't) but obviously I'm worried if that's normal and healthy for the baby? No morning sickness, but no appetite, maybe cuz I don't eat enough? Input please!