Hmmm... I've got about 20 pounds so far, too. I figured if we are doing three trimesters, and if I average ten pounds per trimester, then I'm doing good so far.
I started this pregnancy out heavier than my prior two, so it been harder to not beat myself up about the weight. My first I hit 35 lbs extra exactly, my second I LOST weight, so this time around has been tough. I'm not really sweating it though. I figure it will come off, and I don't mind being pregnant in my typical "season of fatness"(the holidays) anyway... Summer is always the time the weight falls off. I didn't get that this summer, as I got pregnant while still wearing most of my holiday weight in the spring, and then didn't do a dang thing all summer(mow grass, garden, run around with kids) because I was indisposed. I figure this baby will be here and breastfeeding happily by late winter, I'll have time to get back on track and on my feet by the time my "season of thinness" rolls around.