I have just seen this, but then I am not around much these days so sorry for not replying earlier.
In my very humble opinion I think you should eat. If you don't your weight loss will slow down.
You need a good balanced diet which is what SW is. If you are not that hungry make an omelet with lots of tomatoes, mushrooms, onions, whatever you fancy. A saucepan of homemade free soup is a good standby too. Yogurts go down well and are small but full of nutrition.
If I have a day like yours I am always surprised when I make myself eat something at how hungry I really am.