unfortunately, guys are the lucky ones who can lose up to 7 lbs a week regularly... as a female, you'll probably average 3-5 lbs a week -- which by the way, is AWESOME! no other diet can compare - and it's ALL FAT!
I'd limit the cooked onions - if you're eating them, make sure that they are only slightly sauted. If cooked too well then the onion sugar is actually created.
Good luck !