Why am i feeling like i do?

I've actually had this lately too. No appetite, mild insomnia, both problems that I've never had before. I suspect the appetite at least is just the summer heat. The humidity makes me feel full and nauseous, also sluggish. Summer is less busy for me, so I tend to get restless, which I think is why I'm not sleeping. Keep an eye on it, but you may just have a case of the summer doldrums too.