Weight isn't the only measure you should be looking at. I almost always plateau on weight loss quickly when I start an exercise/diet program. However, I continue to get smaller. I have been 250 lbs for about three years now but as I started cycling and eating better my waist size has gone from 40" to 36". My shirts are the same size but they don't fit as tight around the middle.
And, stop weighing yourself everyday, once a week should be enough.