Anyone gained any significant weight yet?

Katy
I'm only 5 weeks along, and I've already gained about 10 pounds!!! I know I've eaten more than usual, but I can't fathom how that's added up to 10 pounds in a month. I haven't had any real morning sickness (yet), and i don't know if I will. It doesn't help that I'm in recovery for an eating disorder, so while I've accepted the fact that weight gain is necessary and inevitable, I'm really discouraged that it's already added up this fast. Im eating the proper nutrition as best I can for my baby, but I'm worried that it'll keep adding up this fast every month! Can anybody weigh in?