Yes, my appetite is pretty low sometimes! I find that cheese and a celery stick can be enough for lunch (and if you have asked me pre-low carb- I would have thought I would stave to death!). You may be getting sick of the same stuff, mix it up, dont let yourself eat the same things everyday, there are endless low carb recipes out there, get creative! I made creamcheese with loads of fresh garlic and a small amount of sundried tomatos in it, and a squeeze of lemon juice all mixed together, and spread it in some celery, needless to say it jazzed that snack up!

Anyways, eat when you are hungry, the body is pretty good at keeping you informed of what it needs usually.

Good luck!