You can get in earlier if symptoms are deemed urgent. My son was on a long waiting list a few years ago when he said something about killing the baby. I was in a high risk pregnancy. I called the psychologist and got an urgent appointment slot the next day. Thankfully it turned out to be an impulsive ADHD tantrum. Keep the urgent appointment option in mind if she starts showing aggressive behavior.
I found cognitive behavioral therapy workbooks most helpful for my son. The psychologist was all about reward charts and that made my son worse! Think Good Feel Good workbook gets my recommendation. It's a tiny bit cheesy, but the teen workbooks don't apply well to elementary age relationships. If she is struggling socially in school, 100 Social Rules book is excellent for defining what to do when. That book helped my son turn his behavior around!