NeuroTalk Support Groups

Hi, my teenage Daughter suddenly started walking like she was drunk almost 2 weeks ago, and started slurring her words about 5 days later, well that's when we noticed her speech issue. We took her a neurologist at Children's Hospital about 4 days after her symptoms began. We were told that she would be ok and that she would probably to be back to normal within a few weeks. That was hard to take but we took that as encouraging. When she started slurring her words,, we took her to Mott's Children's Hospital, which was 3 days ago. They did a brain MRI with contrast on her. They couldn't find anything. They also ran 6 different blood tests which were negative. We were sent home and told that the Pediatric Neurologist would follow up with us..
They followed up with me the next morning, Thursday, and were going to set us up with a pediatric Neurologist who will be best suited to help her. Yesterday she told us that she is having trouble writing/texting. She doesn't have any pain,, numbness, pins or needles..
I feel like we are watching our daughter deterioate right before our eyes and we don't know what to do. I can't imagine what is happening. We feel so helpless. Just waiting is torture. Has anyone ever had or know someone that has had something like this happen to them?