You should never be hungry on SW. What are you having for your dinner, is it big enough to keep you satisfied all afternoon? Are you able to snack at work?
You need to make sure you eat till you ae full and then only eat if you are genuinly hungry. Which it sounds like you are. Make sure your meals are substantial enough and keep snack such as fruit, hifi bars, yogurts, mug shots, low syn crisp with you incase of hunger. You could also prepare something to keep in the firdge to snack on while you cook your evening meal. Like carrot stick, boiled eggs.
Do you plan you meals, I just quickly note down what I'm going to eat the next day before I go to bed. I do meals first incase of any HEX and syns then plan my snacks as well. Make sure you drinking plenty of water as sometimes thirst can be mistaken for hunger. Speak to your cons if you don't understand the plan properly she will be happy to explain it all to you again. Good luck.