Congrats on 17 days! Remember that you have 2 weeks + a few days. 2 lbs. is awesome! I've gained 10 pounds, but my eating has been a lot of sugary things, restaurant foods, and not a lot of exercise. When I exercise, my weight will regulate.
For you, at 17 days, your body is regulating to no drinking. Give time time. Chew more, eat slowly, drink lots of water. You'll be ok, in time!