Butterfly, give each change a week to see how it goes, okay? Personally, eating any carbs in the morning makes me feel just like you described and I get bad cravings, too. I limit my carbs and fruit to lunch or after, and now I have lots of energy. So while you are trying grain, try another week of having it in the afternoon and see if that helps. If not, do a week of fruit and no grain and see what happens. I know some people just can't do grains and some can't do fruit. It's just a matter of what works for your body.
Take gentle care of yourself while you are figuring this out, okay? And if you still feel depressed, make sure you see a doctor, okay?