It's hard to tell what might be normal or not, without knowing more about you! How much do you weigh now, how tall are you, etc.
In general a rate 1% of your body weight per week (for most people that's somewhere between 1.5 and 2 lbs per week) is considered healthy weight loss. So just based on what you've said above, in 8 weeks, you've lost 15 lbs, which is slightly under 2 lb a week.
Sounds about right to me.
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