Up the carbs!!! There is no reason to keep them under 25! Mark says 50-100 for effortless weight loss. Especially being new to it I would be eating higher carbs. Of course they should be from good sources.
It does take time for your body to adjust, but it may also be caused by an allergy/sensitivity to a new food you are eating. I'd just try upping the carbs first, curious what does your menu look like right now?