My 6 Year Old Daughter, For Past Two Months Has

My 6 year old daughter, for past two months has had a unnormal temp Everyday. Hi Mostly. Her KNEES feel like they aren't working. She shakes and sits to do Many things that she Always Stood to do Before. I can't get anyone to help . I been to 3 different Government Hospitals and ALL DISMISS HER . SAYING she IS OK BECAUSE SHE CAN WALK AND JUMP. I SWEAR TO GOD- SOMETHING IS NOT RIGHT..