I am now 18 weeks. For the first 17 weeks I had put on 6.5lb. When i got on the scales this morning, it says I have put on another 6.5lb in 3 DAYS! I haven't done anything drastic like eat my weight in food, my bump has gotten bigger in the last week but I seriously doubt 6.5lb!! Could it be extra water or what? Will have to see if the scales change as the week goes on, maybe it will go down a bit, my weight has been generally going up and down throughout the week but never this much!!