don't worry that fuzzy feeling is probably your brain taking a holiday.
there are more things you need to 'worry about' than calories....
buy some malt extract.... it is a honey like treacle like substance... which you can mix into hot drinks and stuff... it has lots of B vitamins... which are essential to brain function...
it would most probably be that you have not found any iron on your hunt for calories...
also if you are super skinny, which you probably are... then your body won't have much reserves of anything... so feeling dizzy... is just your brain being all "hey you feed me some shit apart from diet coke which is really bad for me, you ass hat... how about a leaf once in a while"..
I cannot speculate your brain would be as eloquent as myself, so I put it into slander speak
good luck, and chewing carrots is fun *truestory