Most of what you have lost so far will be fluid (eating carbs often causes us to retain water), so losing that is a good thing. I don't think wandering around carrying extra liquid is ever a good idea.
If you don't want to lose any more weight, then there are a couple of options - eat more protein, eat more carbs, or eat more fat. If you have gone very low carb, eating the fat may not work, since fat and carbs together seem to be the way to put weight on the quickest and easiest. But protein and fat may be your best option. You could also do more exercise to build muscles (but that would still end up meaning that you needed to eat more to feed the muscles, which are hungrier than fat tissues).