A bit late to the party myself, but ^^^THIS^^^ as said above. Would also be useful to know the OPs workout routine and such as well. If carbs don't help, what sort are you eating (simple vs complex. It really does matter.). Sounds like either hypoglycemia, not getting enough of the proper macros, or messed up electrolyte levels. Are you taking any dietary supplements, which if you haven't done the research and take them improperly, can easily mess things up.I didn't say anything about carbs yet (I have a preference for low carb diets myself, though I will not pretend to be an expert).
1)exactly how many calories are you eating to begin with? a friend of mine has hypoglycemia and has successfully gone from 265 pounds to 203 (in about a year or so) by restricting his calories to around 1700 a day and working out regularly. if you're not eating enough, it can throw off your body and do a nasty number on your metabolism.
2) what macro nutrient ratios are you eating (carbs vs fat vs protein)? the ideal proportions will vary considerably based on individual situation, but regardless, they're important to take note of (personally, I have a preference for more protein-rich diets overall, but again, I can't exactly give an expert opinion here)
My judgment? More information is necessary.