Don't forget, it's normal for your weight to fluctuate by a couple of pounds. I find it better to weigh just once every couple of weeks, or judge by my waistband!
Also, slow weight loss is a lot more likely to last than quick weight loss. A lot of the weight loss the first week or so will be water loss as your body adjusts to the new food and exercise regime.
When I lost my excess 35 pounds last year, it took from January until the end of October, but I was eating well-balanced healthy meals, not feeling hungry, and not feeling deprived. I think it's much better for your body to do it slowly and if you don't feel like you're depriving yourself of too much, you won't be as likely to get off track in a month or two.
Still holding at what is actually about 5 pounds less than my desired weight.....CaroleD