Weight loss at 9 weeks

I am 9 weeks pregnant tomorrow and I have been eating more than I would normally. I am vegan and don't diet but i do watch what I eat to keep within a healthy weight. Anyway I've been eating more carbs like bread and potatoes and pasta etc because I've felt like I wanted to really, I weighed myself this morning and I have lost weight, I know the metabolism speeds up while youre pregnant and I don't want to put any more weight on than I need to, but I thought I'd at least have put a few lbs on the way I've been eating. Anyone else lose weight even though I haven't been feeling too sick and I have only been sick twice.

Thank you