we was told the same about our son. Dr's are not all knowing and seeing. I bet if you asked her how she did it day in and day out she would tell you she dont know. ( or atleast in my case thats how I feel. I do it because i love my son I want the best for my son. ( we home school him) not a easy task but it is what is best for our little man. and oh yes exhausted that's one word drained is another LOL BUT in the end its ALLL worth it! give your sil a hug for me