I only gained about 3-5 pounds before 20 weeks, but once i hit 20 weeks i definitely started gaining. Im 25 weeks now and have gained 17 pounds. With my first daughter though i only gained 28 total so i wouldn't worry. As long as your doctor isn't concerned, don't stress about it. Enjoy it. Im sure you'll start gaining soon :)
Im 32 weeks and 5 days . I don't remember exactly my weight at 20 weeks but ive gained about 55 pounds so far. Eek.
I've lost 19 lbs. Ill be 21 weeks tomorrow ...