livestrong is great and so is www.sparkpeople.com
when I was BF i used sparkpeople even though it says not to if youre BF, I just continued and kept in my head a couple extra 100 for BF. It worked so well bc they have literally EVERY food, shake, smoothie, restaurant- you name it!!! listed in there with all nutriional information so you can log your intake and exercise etc and have a very good outlook on your day and week to see why you are or are not losing.
after i lost my baby weight i stopped using it bc it helped me springboard into a lot of good habits, so I didn't need it.
also, since you say it's only been a few days DONT STRESS.
your body is adjusting.
this could take even a week.
xoxo