Yes, not enough calories for you. Your body thinks it's in a famine. How can your DH lose while eating the same as you? The male metabolism is faster, because there is more muscle mass. Females have to have a certain amount of fat on their bodies in order to continue the species. Up the calories at first by increasing the amount of fat you take in. It could be through the form of olive oil drizzled on salads, butter melted on vegetables, or adding avocado to salads. See how upping the fat intake works on you. Then, if you are feeling brave, add some nuts or berries here and there like your DH does, maybe your body will react with a whoosh! Good luck LCing!