Possibly. I'm not sure what that translates to in lbs but I'll take your word for it! Eating five or six small meals a day may help. Pregnancy does screwy things to your metabolism.
Yes, I seem to be the complete opposite and rather than nausea, I get super eating. I am only 50kgs so I think my body may just need the extra energy considering I hardly used to eat on a regular basis!
Normal. Your body is doing lots of work making a baby. Just be grateful you have an appetite rather than nausea! To reduce weight gain though, make sure you have healthy snacks on hand. Fresh fruits and vegetables can help fill you up without packing on the pounds. You don't need to easy double portions just because you're pregnant! :)