16 Weeks - Lost a couple pounds

First time momma question: Anyone else gain 8 pounds or so in the first trimester, then lose a few in the first couple weeks of the second? I was 10 pounds overweight prior to pregnancy and I’m guessing some of my weight gain was bloat which is gone now?? Just worried that baby is okay and wondering if this is common. Also feel like I have less of an appetite now because I don’t feel nauseous all the time.