Since October, I have been working out. Lifting four days. Cardio everyday, On days that I'm not lifting, I do more cardio. I have been losing about 4-5 lbs a month, which my doctor and others say is good. In the summer, I've ramped up the workouts, more supersetting with the lifting, and added some cycling in the evenings.

May to June I lost 5.5 lbs.
June to July I lost 3 lbs or so
The last two weeks -- lost 8 lbs!

Is there too much to lose at once?

Don't get me wrong, I'm happy, but I want to make sure I don't lose too quickly and then yo-yo back. I don't think I'm doing anything unhealthy. I feel good and am eating 1700-1800 calories a day.

Does your body just react at different times differently? Are their leaps sometimes and slow times at other times?