For the past 3 weeks I have been doing 1 - 1.5hrs of moderate/intense exercise 5 days a week. I have had 2 slices toast or porridge for breakfast, fruit at lunch and a normal tea (spag bol., chilli, etc). I drink a bottle and a half or wine over the course of a week. I am currently not overweight but want to lose half a stone. Where am I going wrong?