I’ve gained my first lb this week. Everyone is different

Around 24 weeks.

With my first, right away, with my second, I lost most of my first trimester and didn’t really gain until a bit into the second.

I lost a couple and didn't gain any until almost 20wks then I blew up really fast.

I’ve lost 4 pounds so far.

I didn’t gain weight until 6 1/2 months I kept losing weight like crazy cause I was throwing up and so nauseous it was so hard for me to gain weight

Generally you should only gain 2-4 pounds your first trimester. I hardly gained anything with my second pregnancy. I started losing weight because I had no appetite.