Anxiety

My little girls newborn screen came back abnormal with a metabolic deficiency after several blood test they determined her blood had become acidic so they flew us to the cooks genetic hospital in Fort Worth. After several more blood test and 5 days of B12 shots they sent us home with some answers but nothing set in stone as to what she has. They told us to keep giving her the B12 at home everyday. After about 2 weeks they called and her DNA test came back turns out she doesn’t have a B12 deficiency and to stop giving her the shots. But my anxiety has gotten so bad I can’t determine what is typical 2 month behavior like how much she eats and sleeps or if something is wrong in the end we got no real answers and it’s hard living everyday never knowing if she is ok or not. She is so small she was born 6lbs dropped to 5.13 than dropped more at 5.7. Now she weighs 8lbs but is still so tiny and only eats 2.5-3oz she was eating every 2 hours now it’s every 3 she only eats twice at night and sleeps a lot I feel like. I just wish I had some real answers