Why is this happening with my trying to lose weight?

Anonymous
I've been trying to loose weight for a while. I exercise pretty much every day and I watch what I eat. I weigh myself once a week. One week I will loose 2lbs. The next week I've gained 1lb. The next week I've lost 3lbs. It's never a consistent weight loss or gain. I've only lost a total of like 7lbs, but I can see a big difference when I look in the mirror. What could I be doing wrong?
Why is this happening with my trying to lose weight?
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