Okay Mom's of twins just a question...I am 15 weeks as of tomorrow. And I don't feel like I have gained any weight. When I have stepped on a scale it says that I have gained maybe 1-2 pds. Should I be worried if I am gaining enough weight for my babies to grow? There are even times that I don't even feel pregnant. My next ultrasound isn't until I am 18 weeks. Just curious how others Mom's have felt.