@ceceomfg You may not necessarily gain weight with a few days of keto diet, but if you DO gain weight, you will also feel more energetic , and less fatigue.
@ceceomfg My 2 cents: Try keto diet.
You can eat as usual, but cut the sugar consumption to a minimum. Also, if you don't feel hungry during dining time (eg. 6pm), skip a meal. Don't force yourself to eat because you have to.