How much weight can I lose in 10 weeks?

Consult your doctor. How much weigh you can lose may be different than what is healthy for you to lose. If you are looking to lose as much weight as possible in a 10 week period perhaps you should reconsider your motives for weight loss. It may be wise to consult with your doctor to get a better idea of what is healthy given your current bmi as well as help you to set a realistic target bmi and timeline to achieve.