macadamia nuts are almost starch free (0.7 in the starch content food list) and are loaded w/ fat and calories. mix up some of those or some almonds w/ some chocolate chips, raisins and some coconut for a healthy and fattening snack on the go (delicious too by the way). Some people eat coconut oil by the spoon full. Beer is super fattening (only if you're of legal age!) Get some of Kiwi's coconut flour treat recipes for easy muffins and snacks. If dairy doesn't bother you, then eat ice cream and cheese, make your own milkshakes and add some protein powder. If you are physically able, I would recommend hitting the gym and doing some weight lifting (heavy weight/low reps). It will boost your appetite and add muscle.
I have no problem maintaining my weight on NSD, but I understand many people do. I suppose it may be an issue with some of us that we are unable to fully absorb and utilize what we eat.
I understand why your mum is concerned about you if you are dropping weight and the doc is telling her you are becoming an anorexic. Perhaps you should let her browse this website and see if that helps her understand. Good luck.
