Not Gaining Weight

So they did another ultrasound yesterday. They thought the one big kidney stone was clogged because of Ava being so fussy, not sleeping or gaining weight. Well it is not clogged but Ava is still fussy, not sleeping and now losing weight. We are not sure what is wrong. Her levels are still a little off, but nothing that is way high. The are mixing her formula way weird. Half this , half that.. To have less calcium, and less potassium. It has to sit, be drained for four hours before she can eat it. I am thinking they are going to put a feeding tube in today it see if that helps her with the weight. So again we are still in the hospital hoping one day we will get out of there.