Yes during the beginning of pregnancy most people lose weight due to not feeling hungry or having morning sickness. I personally lost a couple pounds and a friend of mine lost 10. You'll get more hungry around the 2nd-3rd trimester. And not having any symptoms is normal as well every person is different and each pregnancy is different. During my first pregnancy I had about every symptoms and then this one I have nothing not even sensitive boobs, not even urinating frequently and I'm 29 weeks! Dont worry about it you're fine! Congrats on your pregnancy! :)