Checking back in. I'm 22 weeks now and zeroed out at my pre-pregnancy weight a couple weeks ago. Still sitting right around there (I may have gained a pound more, but I wasn't entirely sure on my pre-pregnancy weight to begin with). I am frickin' HUGE and everyone knows I'm pregnant when they look at me (as opposed to just wondering), so I'm not worried about it. I have a midwife appointment this Friday and I'm sure she won't be worried either because she wasn't when I went down by 10 lbs during the first trimester (I didn't even vomit, so who knows why).
I was slightly overweight before I got pregnant (BMI of 27) because I never lost that last 10-15 lbs after DD was born (apparently that's common when you're still breastfeeding. Comes off fast, but then the last bit sticks around).