Initially your reduction in food causes the water held in your gut to drop and as water is heavy it is where most of your initial gain comes from, you should then see a plateau period as the underlying reduction in fat appears which is slower, about 1.5% of body weight/week is highly doable.
As your fat goes down then the reducing fat causes the appetite to kick in and your weight loss slows. So initial larger gains will later slow.
If you measure too micro-detailed your weight then those plateau periods can cause a negative feedback and you give up. That's why a long-term macro-detail has to be the focus, because in the long term a 2Lb/week loss is highly achievable as its only 1000C/day loss which is going to bed a little hungry and doing a couple of hours of exercise such as walking or biking to work and a bit of hiking, swimming, etc.
Look at the chart on the wall on this video see the two points above of more rapid initial loss, and some weight gain spikes as water levels vary daily, then extrapolate to your future of the games in your mind during those apparently non-losing or increasing weight periods. Keep at it.